Lemon Blueberry Cake

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This easy Lemon Blueberry Cake is a moist lemon cake loaded with sweet blueberries and topped with lemony mascarpone frosting! Between each layer of cake is mascarpone whipped cream and a tangy lemon curd. This easy lemon cake is a showstopper. 

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A slice of lemon cake with blueberries on a teal plate and a cake stand in the background

Lemon Blueberry Cake

This Lemon Blueberry cake is the bomb you guys. The layers of moist lemon cake are loaded with sweet blueberries. In between each layer of cake is mascarpone whipped cream and a tangy lemon curd.

One of my girlfriend’s described this cake as not overly sweet but loaded with flavor. It’s a crowd favorite. Of course, the lemon and blueberry are a match made in heaven.

The lemon cake base is the same recipe as my Lemon Cupcakes. It’s an oil-based cake recipe, so there’s no time spent waiting for the butter to come to room temperature. All in all, this takes maybe 10 minutes to prepare.

The cake version is just as easy and with the added blueberries makes it even better. I am going to walk you through exactly how to make this cake, including a step-by-step video.

A shot of a while cake on a white cake plate. The cake is garnishes with whipped cream, lemon slices and blueberries

Lemon Blueberry Cake Ingredients and substitutions

  • Standard cake ingredients including sugar, flour, baking powder, salt and eggs.
  • Vegetable oil makes for a more tender crumb and helps produce a moister cake.
  • Lemons zest and juice the lemon zest bring out a stronger lemon flavor, and the lemon juice. Do not skip the zest as it adds a lot of flavor.
  • Lemon extract to enhance the lemon flavor. This can also be substituted with vanilla extract if needed.
  • Sour cream makes this cake very moist. I used light sour cream, but any sour cream will work in a pinch. If you don’t have sour cream, you can substitute with nonfat Greek yogurt.
  • Buttermilk for acidity, flavor and moisture. See recipe notes for substitutions.
  • Fresh Blueberries will be tossed in a little bit of flour to help prevent them all from sinking. If you need to use frozen berries, you don’t need to toss them in flour.
  • Lemon curd for the filling. It’s optional but it really adds that punch of lemon flavor to this cake, I don’t recommend skipping it.

An overhead shot of zest lemons

How to Make Blueberry Lemon Cake

  • Prepare your baking pans. I’ve offered some helpful hints below.
  • Beat together the sugar, vegetable oil, eggs, and lemon extract.
  • Next add the lemon zest, lemon juice and sour cream and beat until the batter is well combined.
  • Combine the dry ingredients in a separate bowl, then alternate adding half the dry ingredients with half the buttermilk and beat until well combined.
  • Toss the blueberries with 2 tablespoons of flour. Then gently fold the blueberries into the batter.
  • Divide the batter evenly between the three pans, about 1 2/3 cups of batter per pan and bake according to instructions in the recipe card.

Tips for baking this cake

For the layers of cake, I use three 8-inch baking pans, it’s approximately 1 2/3 cups of batter per pan.

It’s important that you line the bottom of the pan with parchment paper or 8-inch silicone baking liners. This will ensure you can easily remove the cakes from the pans.

I also bake my cakes with bake even stripes. These are used to create a nice even and level cake. It prevents the edges of the cake from cooking too quickly and therefore rising in the middle.

If you don’t have bake even stripes, that’s totally fine, you’ll just need to cut the dome of your cakes off with a cake level or serrated knife before you start laying them.

An 8inch cake pan lined with a silpat baking liner

Mascarpone Whipped Cream Frosting

For the frosting, I went with a simple mascarpone whipped cream. It’s an amazing, thick whipped cream frosting that is not too sweet.

  • I recommend placing a metal mixer and the whisk in the freezer for 5-10 minutes prior to starting. Also keeping your ingredients refrigerated up until you’re ready to use them.
  • Spoon the COLD mascarpone whipped cream into your bowl and beat on a medium-low speed
  • Slowly pour in the heavy cream, allowing the mascarpone cheese to turn to a liquid consistency. Then increase the mixing speed to high (speed 8-10) and beat it until soft peaks form.
  • Next, add the powdered sugar and vanilla extract, beating on low until sugar is incorporated. Then continue beating at a high speed until stiff peaks form.

The whipped cream will thicken pretty quickly once the mascarpone has been added. This frosting is very light and it’s not overly sweet so it allows the flavors of the cake to really shine through.

An overhead shot of a glass mixing bowl with a whisk filled with Mascarpone Whipped Cream

How to Assemble the Cake Layers

  • If your layers are not all the same thickness, place your thickest and flattest layer on the bottom.
  • First, I pipe a layer of the mascarpone whipped cream and spread evenly. Using a piping bag helps to ensure an even distribution of frosting.
  • Then spread a layer of lemon curd (about half the jar). Don’t spread the lemon curd all the way to the edges, stop about ½ inch from the edge
  • Add the next layer of cake on top, and press it into layer below. Try your best to place it centered and not leaning to one side or the other.
  • Invert your top layer, so the actual bottom of the cake layer is on top, giving you a nice flat surface on the top of your cake.

For more helpful advice see the tips I’ve shared for how to make layer cakes.

A slice of lemon blueberry cake on a teal cake plate with a few bites taken out of it.

How to Decorate this Lemon Blueberry Cake

I decorated this with a thin layer of mascarpone frosting, you can see it’s a little bit rustic.

Use any leftover frosting to decorate this cake. I used a large open round piping tip. Then you can garnish this cake with fresh fruit like lemon slices and leftover berries.

How to Store this Cake and Make ahead options

Once frosted, this cake can be made up to 2 days in advance and stored in the refrigerator in an airtight container such as a cake carrier. To make the layers ahead of time, cool completely, line the top and bottom with parchment paper and tightly wrap in plastic wrap.

I do not recommend making the frosting in advance and storing it separately. Make the frosting and frost the cake immediately. Then store in the refrigerator.

Variation ideas

I’ve made both a lemon blackberry cake and a lemon raspberry cake using this same recipe. You might also love this with a strawberry sauce filling, similar to my Strawberry Mascarpone Cake.

Can I use frozen berries?

Note that I have not tested this with frozen blueberries but it should work. Frozen berries may have more moisture than fresh. Toss in the batter when frozen and do not coat in flour.

Why do my blueberries sink in my cake?

Coating fresh berries helps prevent the berries from sinking to the bottom of the cake. However, there is no way to fully prevent this. I recommend using smaller berries if possible. 

Also I like to drop a few berries on top of the batter prior to putting the cake in the oven to bake. 

A close up shot of a layer cake topped with lemon slices and blueberrues

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A close up shot of a lemon blueberry cake on a teal cake plate

Lemon Blueberry Cake

  • Author: Beyond Frosting
  • Prep Time: 15 minutes
  • Cook Time: 23 minutes
  • Total Time: 38 minutes
  • Yield: 10-12 slices

Description

This easy Lemon Blueberry Cake is a moist lemon cake loaded with sweet blueberries and topped with lemony mascarpone frosting! Between each layer of cake is mascarpone whipped cream and a tangy lemon curd. A moist oil-based cake that’s fluffy and is truly the best blueberry cake ever!

Ingredients

For the cake:

  • 2 cups (380g) granulated sugar
  • ½ cup (118 ml) vegetable oil
  • 3 large eggs
  • 2 lemons- zested and juiced (see below)
  • 1 teaspoon (5ml) Lemon (or vanilla) extract
  • ½ cup (118 ml) light sour cream
  • 2 ½ cups (350 g) all-purpose flour
  • 3 teaspoons (11.2 g) baking powder
  • 1 teaspoon (5 g) salt
  • 1 cup buttermilk (236 ml) (or milk)
  • 1/4 cup (59ml)  fresh lemon juice
  • 9 ounces fresh blueberries, washed and dried
  • 2 tablespoons (15.6g) all-purpose flour

For the frosting:

  • 2 ¼ cups (532ml) heavy whipping cream
  • 1 cup (130g) powdered sugar
  • 1 teaspoon (5ml) pure vanilla extract
  • 16 ounces mascarpone cheese, cold
  • 1 jar (10 ounces) lemon Curd

Instructions

  1. For the cake: Preheat the oven to 350°F. Prepare three 8-inch round baking pans, line the bottom with parchment paper and grease the sides. Prepare your bake even stripes if desired.
  2. In a large mixing bowl, combine the sugar, vegetable oil, eggs, and lemon extract. Beat on medium speed until the eggs and oil are well incorporated and the batter is lighter in color, about 2 minutes. Scrape down the bowl as needed.
  3. Next, zest 2 lemons into the batter and then juice the lemons to get 1/4 cup of lemon juice. Add the lemon zest, lemon juice and sour cream to the batter beat until well combined.
  4. Combine the dry ingredients in a separate bowl then add half the dry ingredients to the batter, beat on low speed while pouring in half of the buttermilk and mix just until the flour starts to incorporate.
  5. Finally add the remaining dry ingredients and remaining buttermilk and beating until all of the ingredients are well combined.
  6. Use a spatula to scrape down the sides of the bowl and stir the batter from the bottom to the top to ensure it’s well mixed.
  7. Toss the blueberries with 2 tablespoons of flour. Then gently fold the blueberries into the batter, saving a small handful to drop on top of the cake batter.
  8. Divide the batter evenly between the three pan, about 1 2/3 cups of batter per pan. Drop the remaining raspberries on top. Bake at 350°F for 20-23 minutes. Rotate your pans in the oven halfway through baking.
  9. Test the cake for doneness by inserting a toothpick into the center of the cake. If the toothpick comes out clean, you cake is done. Remove from the oven and allow to cool completely.
  10. For the frosting: Place the mixing bowl and whisk attachment in the freezer for 5 to 10 minutes to chill.
  11. Spoon the COLD mascarpone whipped cream into your bowl and beat on a medium-low speed (speed 3 on your stand mixer). Slowly pour in the heavy cream, allowing the mascarpone cheese to turn to a liquid consistency.
  12. Then increase the mixing speed to high (speed 8-10) and beat it until soft peaks form.
  13. Next, add the powdered sugar and vanilla extract, beating on low until sugar is incorporated. Then continue beating at a high speed until stiff peaks form.
  14. To assemble the cake, use a cake leveler to cut the domes off the top of the cake. Place a dollop of frosting on your cake board and place the bottom layer of cake on top of that.
  15. Place half of the whipped cream in a large piping bag fitted with a large open round tip, or simply cut off the end of the piping bag. Pipe a layer of frosting and spread evenly. Then spread half of the lemon curd over mascarpone filling.
  16. Add the second layer of cake and repeat the above steps using all of the remaining lemon curd. Next, add the final layer of cake on top.
  17. Use your piping bag to fill in any gaps between your layers and to create a crumb coat. Using an offset spatula or icing smoother, wipe away the excess frosting, leaving you just enough to coat the outside of the cake. Do not mix your crumb coating frosting back into your icing if it has cake debris in it.
  18. Proceed to frost the top and sides of the cake using your offset spatula. Once the sides of the cake are covered, use you icing smoother to remove any excess frosting. You can take the end of your offset spatula and gently place them against the sides of the cake as your rotate your cake to add a little texture.
  19. Use remaining frosting to pipe the florets on the top of the cake using an Ateco 809 tip (large open round). Garnish with lemon slices and leftover blueberries. This cake must be refrigerated.

Notes

  • To substitute the sour cream use a plain non Greek yogurt. Full fat sour cream will also work
  • To make homemade buttermilk use 1 tablespoons of lemon juice or vinegar and then add enough milk to make 1 cup. Allow to sit for 5-10 minutes and then stir.
  • See my detailed tutorial of the Mascarpone Whipped Cream
  • Make ahead and storage instructions: Once frosted, this cake can be made up to 2 days in advance and stored in the refrigerator in an airtight container such as a cake carrier. To make the layers ahead of time, cool completely, line the top and bottom with parchment paper and tightly wrap in plastic wrap.
  • Sub blueberries with raspberries or blackberries
  • I do not recommend making the frosting in advance and storing it separately. Make the frosting and frost the cake immediately. Then store in the refrigerator.
  • Frozen berries: Note that I have not tested this with frozen blueberries but it should work. Frozen berries may have more moisture than fresh. Toss in the batter when frozen and do not coat in flour
Nutrition Information:
1 slice
672
60.1g
370mg
32.6g
21.1g
89.9g
2.4g
8.4g
112.6mg
  • Category: Cake
  • Method: Oven
  • Cuisine: American

Keywords: lemon blueberry cake, easy lemon cake recipe, lemon cake recipe, easy layer cake

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71 Responses
    1. Beyond Frosting

      Hi Rosie- I’ve never tried it, but these baking substitutes can change the texture, baking time and flavor of the cakes.

    1. Zoe Xydias Nicolaou

      I went ahead with it and it was delicious! Thank you. The bottom half of the sponge tho’, that had most fruit, was like clafoutis whilst the the rest of it (with less fruit) was like fairy cake … Is this ok/fault? If so, how does it get corrected?

  1. Krystel

    My batter was thicker and my cake came out to be doughy in the center. I’ve tried baking it again with tin foil wrap on top to trap the heat and help the cake bake more…still didn’t work. Where did I go wrong ?

    1. Beyond Frosting

      Hi Krystal- I tried to email you but the email bounced back. It’s hard to say exactly, as I don’t understand how thick you batter was- if you maybe forgot to add an ingredient or made a substitution. It sounds like you didn’t bake the cake for long enough if it was still doughy in the center. You should bake it until you can insert a toothpick into the center and comes out clean. The baking times are suggestions but everyone’s oven and type of pan they are using will be different. If the top is browning too fast then you can cover it with foil but it still needs to be baked though.

  2. Cooki

    Love love lemon cakes of any kind besides lemon cream cheese or mascarpone frosting. This recipe looks from the pictures & ingredients oh so heavenly that my mouth is watering. How many cups does the frosting make? Also how many cups of frosting per layer & then for the entire cake.

    1. Beyond Frosting

      Hi Cooki- I’d estimate the frosting makes approximately 5 cups, I actually have not measured it myself. I don’t provide estimated cups per layer because I use a piping bag, so I go around each layer in a circle working from the outside edge into the middle.

  3. Min

    The cake itself was awesome.
    The frosting just melted all over mid project. I’m pretty new to baking and I’m not sure what I did wrong… but I had to refrigerate the icing so I could frost the cake because the layers were slipping all over one another. it looked like the fairies’ cake from Sleeping Beauty! I even had to stick a paper straw through the middle to hold it up! ??‍♀️??‍♀️??‍♀️

    1. Beyond Frosting

      Hi Min- It’s okay to use the straws, I do that myself. It sounds like the frosting wasn’t whipped long enough maybe, or you put a little too much frosting between the layers. I would recommend watching the video on my Mascarpone Whipped Cream post, might help with the frosting consistency. Keep it mind it is still a whipped cream and doesn’t like to be overly handled.

  4. George Smith

    One of the best cakes I’ve ever made. Followed the cake recipe exactly. 23 minutes in my oven was perfect. I opted for stabilized whipped cream for the frosting with homemade lemon curd. Decorated with a mound of fresh blueberries and candied lemon slices. Thanks!

  5. Alina Sebastian

    I only have 9 inche pans, how would i make a cake using only 9 inch pans & how many would i need?

    Also can i add other fruit in besides blueberries?

    1. Beyond Frosting

      Hi Alina- I’ve done this cake with blackberries. As far as baking for 9 inch pans- I have not tested this recipe specifically. For my vanilla cake, I made 2 9-inch pans that baked for 28-32 minutes. The baking time for this would vary because the ingredients are different and a bit heavier, especially with the berries. For 2 pans, I’d start with 30 minutes and adjust accordingly. For 3 pans, it would be less. I would set the timer for 20 minutes and check from there.

    1. Beyond Frosting

      The regular lemon cake bakes for 25-30 minutes but with the addition of the blueberries, it may need a couple minutes longer. I’d reduce the blueberries for a 9×13 inch cake, it wont’ bake up flat on top due to the berries.

    1. Beyond Frosting

      Hi Hannah, I have not tried to do it with the full recipe. I have tried this cake batter as cupcakes I did not like how they turned out, just really uneven because of the blueberries. But in theory, yes it would work. You can also do it as a 9×13″ cake, but half the frosting.

  6. A. Wonder

    The cake baked nicely and looked very pretty, but the taste is too mild in my opinion. It might be better with a different frosting, but for this one, all I can say is, “meh.”

    1. Beyond Frosting

      Thanks for sharing. I think the frosting, as a whipped cream is meant to not be too sweet or to over power the frosting. I love the lemon and blueberry combination myself

  7. Belinda Perez

    Made this recipe today- my daughter LOVED it! Creamy, tangy, not too sweet, moist and delicious!

  8. Dee

    I’ve made this recipe three times and it’s more work than a regular cake box recipe but the end result is wonderful! I follow the recipe exactly. I learned to pipe icing on the outside rim of each cake layer and put the lemon curd inside of the rim of icing like a barrier so the icing and lemon curd doesn’t squish out between the cake layers. This is definitely a show stopper at parties or get together a.

    1. NeeNee

      Absolute knock out! This recipe was so easy to make and amazingly delicious. I love how all the flavors come together. I used two 9 inch cake pans without any issues. Can’t wait to make this again. 🙂

  9. Denise

    Is there the chance that I over mixed the icing (it now looks a hint more yellow & isn’t as smooth looking)? Is there a fix before I start to use & layer?

    1. Beyond Frosting

      Hi Denise, I am sorry I didn’t see this earlier. It is possible to over mix but that would make it look a bit grainy.

    1. Beyond Frosting

      Hi Rachel, I have not tried it myself, but I did do a test batch recently of my moist vanilla cake, substituting an all-purpose 1:1 GF flour and it baked up just fine. This lemon cake recipe is similar, so think it should work?

  10. Louise

    Hi if i use buttercream and curd would I still need to refrigerate the cake overnight?

    Also if i was making two tiered cakr with 9inch below should I double the recipe?

    1. Beyond Frosting

      Hi Louise, no, with buttercream you would probably not need to refrigerate this overnight if you’re eating the next day. For a 2 tiered 9 inch cake, you do not need to double the recipe.

    1. Beyond Frosting

      You can probably use the pans you have, they will just have more batter in them and therefore need to bake longer. They will also probably dome a bit in the middle, so you’ll need to be sure to level them before frosting.

  11. Kathy

    Oh my!!!!! Excellent cake! Even better after a night in the refrigerator! Moist, bursting with flavor! Not heavy or overly sweet. Pair it with a rich, bold cup of coffee. As mentioned before cake is best eaten cold.

  12. diane

    Just finished making this tonight and it’s AMAZING! This one is a keeper. I love the moistness of the cake and the contrast between the tangy lemon curd and the frosting. Thanks!

  13. Beyond Frosting

    Hi there, thank you for the note in step 15, you’re correct the strawberry sauce should be lemon curd. Step 3 is where you add the zested lemons and lemon juice. Happy baking!

    1. Jennifer

      Please correct the actual recipe to indicate where the lemon zest goes… I read through multiple times and wasn’t until I was done and zest was still sitting there that I thought to read the comments. Thanks!

    1. Beyond Frosting

      Hi Bailey, I should think so, but there’s additional moisture when the berries thaw, I would suggest to still coat them in flour.

    1. Cindy

      So I just tried your lemon blueberry mascarpone cake and the frosting and lemon curd was amazing but the cake was so dense textured that I can’t use it for my daughters wedding cake Any suggestions We used double recipe and made a 3yierwd cake?thanks, Cindy

    1. Beyond Frosting

      Hi there and sorry I missed your question. You can but buttermilk or if not available, milk is fine too but the buttermilk adds some tang to the cake. The vanilla extract is added together with the powdered sugar

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