Buttercream Flower Cake

Learn how to decorate a buttercream flower cake following this easy step-by-step tutorial! Make beautiful buttercream flowers using sweet vanilla buttercream frosting and a few simple piping techniques.

Easy Buttercream Flowers Tutorial

Once upon a time, the most beautifully decorated buttercream flower were trending online, and I had to give this technique a try for myself. You’re going to love how easy it is to make buttercream flowers for cakes, it’s much simpler than you’d imagine.

I used my standard vanilla layer cake for the base. This cake has light, fluffy layers filled with creamy vanilla buttercream, decked out with sweet and colorful frosting blooms.

Why You Should Make This Buttercream Flower Cake

• Step-by-step. I’ll show you how to make a 3-layer cake decorated with buttercream flowers using my favorite buttercream frosting. Plus, tips for coloring buttercream, and more. 
• Easy decorating techniques. Even if you’re just getting the hang of decorating cakes, making flowers with buttercream is super straightforward. With the right tools (nothing fancy, don’t worry), a good frosting recipe, and some basic piping techniques, you can make bright, beautiful roses and swirls to transform a cake into something special.
• Occasion-worthy. A cake showered with buttercream flowers is made for occasions! Make this cake as a birthday cake, for Easter, or Mother’s Day. The pretty flowers make this cake perfect for spring, but it’s just as fun any time of the year.

Ingredient Notes

Here are some quick notes on the ingredients you’ll need to make the cake and frosting for this buttercream flower cake. Scroll to the recipe card for a printable list of ingredients with amounts.

For the Cake

• Oil – Using vegetable oil in place of butter is the secret to ultra-moist and tender cake layers.
• Sour Cream – The extra fat in sour cream is my second secret weapon for ultra-soft, flavorful cakes! You can replace sour cream with Greek yogurt if needed.
• Milk – I use nonfat milk, but you can use whole milk, 2% milk, or any kind of milk you’d prefer.

For the Frosting

• Butter – I recommend using unsalted butter that’s cold from the fridge when making buttercream frosting for decorating. It takes a little extra whipping to get cold butter soft, but the result is perfect, stable buttercream that won’t lose its shape.
• Powdered Sugar – Also called confectioner’s sugar, powdered sugar is extra-fine and key to the frosting’s silky smooth texture.
• Heavy Whipping Cream – For the creamiest frosting, be sure to use full-fat whipping cream.
• Gel colors- For bright and bold colors, you’ll want to use gel colors instead of traditional food coloring. I talk more about this below.

How to Make a Layer Cake

I use my easy-to-make vanilla cake for this tutorial. Of course, you can use any kind of cake you’d like, whether it’s a chocolate layer cake, a sheet cake, or cupcakes. For now, here’s how to make a moist vanilla layer cake. You’ll find printable instructions in the recipe card.

• Combine the wet ingredients. You’ll start by mixing the sugar, oil, eggs, and vanilla. Once the batter is light and fluffy, beat in the sour cream.
• Add the dry ingredients. Next, whisk together the dry ingredients and slowly add them to the wet batter, alternating with the milk. Be careful that you don’t overmix.
• Bake. Divide the batter between three greased and lined 8” round pans. Bake the cake layers at 350ºF for 20-23 minutes, rotating the pans about halfway through. Take out the cakes and let them cool.

Assemble and Frost the Cake

Once your cakes cool completely to room temperature, it’s time to whip up your buttercream frosting. You’ll need enough to frost the cake and make the buttercream flowers, so I recommend making the frosting in two batches.

If you’ve never made my vanilla buttercream before, visit that post because I share so many tips and knowledge behind mastering a thick and stable buttercream that’s perfect for decorating. Additionally if you’re new to working with layer cakes, this tutorial includes everything from stacking and filling cakes to crumb coating and more.

1. Make the frosting. Dice the butter into cubes and whip at a high speed for several minutes until it’s light, fluffy and easily spreadable. Gradually beat in powdered sugar and heavy cream. Give the frosting a good whip so that it’s stiff and airy.
2. Stir out the air bubbles. Once it’s whipped and fluffy, reduce the mixing speed to the lowest speed and beat for 1 minute to eliminate some of the air bubbles. After that, stir by hand using a spatula.
3. Prepare the piping bags. Add 2 cups of frosting to a piping bag fitted with an open round tip. You can also simply snip off the tip of the bag to create a round opening.
4. Start with the first layer. Starting with the first cake layer, pipe frosting over the cake and then smooth it over with an angled spatula.
5. Stack the other layers. Repeat with the second layer and, finally, add the third and final cake layer. Create a crumb coat by filling any gaps between the cake layers with frosting and wiping off the excess with a spatula. Chill for 15 minutes.
6. Frost the cake. I like to switch to a cake icing tip when frosting the outside and the top of the cake (it’s totally optional). Once the outside of the cake is frosted, smooth over the edges using your spatula or an icing smoother.

Coloring the Buttercream

You’ll color the remaining frosting to use for your buttercream flowers. I recommend choosing 3-4 colors in addition to the plain (white) frosting used to frost the cake.

1. Make the primary colors. These will be the colors for the bigger roses and large swirls. In my case, I chose purple and pink. You’ll want about 1 cup of frosting for each primary color.
2. Make the accent colors. Choose the colors for the smaller accents (I chose teal and yellow). You’ll only need about ½ cup of frosting per accent color.

What Food Coloring Should I Use?

The best food coloring for buttercream frosting is gel food dyes, like the Wilton Color Right color system AmeriColor or Chef Master. Gel food coloring is highly concentrated, and just a drop or two goes a long way. I cover the subject in-depth in my tutorial on how to color buttercream if you need more tips.

What Piping Tips Do I Need?

First things first, here are the basic piping tips that you’ll need to create the swirls, roses, and rosettes for your buttercream flower cake:

• Wilton 1M Piping Tip – Open star tip for the purple roses.
• #199 Piping Tip – Large open star tip for the pink swirls.
• #21 Piping Tip – Small open star tip for the small teal accents.
• #2F Drop Flower Piping Tip – For the small yellow flowers.

Fill each piping bag with one frosting color. For the bags fitted with smaller piping tips, consider using couplers. It makes changing out the piping tips super easy! I also have in-depth tutorials on how to use a piping bag and how to use piping tips that will set you up for success.

How to Make Buttercream Flowers for Cakes: Step-By-Step

Your blank canvas is ready for decorating. Let’s get down to the fun part: piping gorgeous buttercream flowers all over this cake! This step-by-step is perfect for beginners and I hope it’ll inspire you to get creative.

Buttercream Roses

You’ll start by piping a wandering line of purple roses up one side of the cake, over the top, and down the other side (see photo). Here’s how to create a buttercream rose:

1. Firmly grip your piping bag with purple frosting. 
2. Position the 1M piping tip in the center of the rose, and gently press out the frosting.
3. Continue to squeeze out the frosting while creating a flat swirl outward.

Buttercream Swirls

Next, you’ll build up your buttercream flower bouquet with some large swirls:

1. Choose your piping bag with pink frosting.
2. Position the #199 piping tip where you’d like the center of the swirl to be. I placed my swirls on either side of the purple roses.
3. Squeeze out the frosting while slowly swirling the piping tip outwards (very similar to how you piped the roses).

Small Flowers

Lastly, let’s fill the space in and around the larger roses with smaller accent shapes:

1. Use teal buttercream with a #21 piping tip. Make the small rosettes by pressing out a small amount of frosting and lifting the tip up and away from the cake.
2. Use yellow buttercream and a #2F drop flower tip to pipe out small flower shapes.

How to Store a Buttercream Flower Cake

• To Store. This frosted buttercream flower cake can be stored in an airtight container or cake carrier at room temperature for 2-3 days. If you live somewhere warm, however, consider keeping the cake in the fridge, and serve at room temperature. Refrigerated cakes should last for 7 days.
• Freeze. I recommend freezing the cake layers unfrosted, or assembled and frosted, before adding the buttercream flowers. Double-wrap the cake tightly in plastic wrap and keep it frozen for up to 1 month. Defrost in the fridge and bring the cake to room temperature before assembling/decorating/serving.

More Cake Decorating Ideas

• Unicorn Cupcakes
• Rainbow Cake
• Cookie Monster Smash Cake
• Construction Cake
• How to Decorate Cupcakes

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