Beyond Frosting ยป Recipes ยป Desserts ยป No-Bake Desserts ยป Brownie Brittle Icebox Cake

Brownie Brittle Icebox Cake

Chocolate lovers, this one is for you! This Brownie Brittle Icebox Cake is made with a no-churn brownie batter ice cream and Chocolate Chip Brownie Brittle. It is covered with a Cool Whip frosting. 

Brownie Brittle Icebox Cake on a platter with a slice cut to show layers of chocolate and cream

Summer is quickly approaching and I’ve got a lot on my plate. Every month seems like I have something big going on. First up is our annual trip to Bass Lake. It is a tradition for my boyfriend’s family, and this will be my third summer vacation with them. It’s really fun for me because we have a house full of people that I can help cook for, lazy days laying by the lake and a little bit of wakeboarding.

Normally I am just cooking and baking for two, so this is a great opportunity to make some of my favorite recipes for a crowd: including dessert. Last summer I made flat-apple pies and they were a huge hit. Now how am I going to top that this summer? I think an icebox cake would be the perfect treat to enjoy at the lake.

Overhead view of Brownie Brittle Icebox Cake on a platter with layers of chocolate and cream

Something genius happened to me last weekend. I’ve been wanting to make a frozen chocolate ice box cake for quite some time, but I wasn’t exactly sure how I wanted to execute it. Then I had this “aha” moment, and decided I would use Brownie Brittle layered into my ice cream. To further the brownie flavor, I used a no-churn brownie batter ice cream. It is a win-win in my book.

This Brownie Brittle Icebox Cake is super easy to throw together and the best part is, it does not require an ice cream maker! That’s right! You can make an ice cream by combining a can of sweetened condensed milk with a container of Cool Whip to help make a mousse-like ice cream. For this recipe, I mixed in some dry, powdered brownie mix and it made the perfect filling for this cake!

Overhead view of a slice of Brownie Brittle Icebox Cake on a plate with layers of chocolate and cream

I’ve been a big fan of Brownie Brittle ever since I was introduced to it. It is quite addicting actually. The great thing about it is that it is a snack I can enjoy and not feel totally guilty about (unless I eat a whole bag in one sitting #dontjudge).

I have actually done several recipes for Brownie Brittle including: Hot chocolate Dip, S’mores Cupcakes, Grasshopper Pie, and Strawberry Lasagna. 

The one thing about the no-churn ice cream base is that is does not freeze up completely. It gets firm, but stays soft enough that you can enjoy it straight out the freezer because it is already easy to cut. It creates a frozen mousse-like texture, which is pretty awesome.

A slice of Brownie Brittle Icebox Cake on a plate with a bite on a fork

To build this icebox cake, you need a freezer-safe container; the best one I have found is a bread pan. It is deep, and usually wide enough to build some solid layers. This cake is covered with Cool Whip, which means that you need to invert it out of the pan before adding the frosting. Therefore, it is best to line the pan with a piece of parchment paper or tin foil so you can easily lift is out of the pan.

To build the icebox cake, start with a layer of Brownie Brittle on the bottom of the pan. For this recipe, I suggest getting a couple bags of Brownie Brittle, so you can find larger pieces of Brownie Brittle to use, but it is not totally necessary. My loaf pan allowed me to place 3 pieces of Brownie Brittle on the bottom of the pan, and then I filled in the sides with smaller pieces. Here’s a great tip: use a serrated kitchen knife to cut the Brownie Brittle into smaller pieces for the edges. Don’t stress if you can’t find the perfect piece since it will be frozen!

Side view of Brownie Brittle Icebox Cake on a platter showing layers of chocolate and cream

The no-churn ice cream makes quite a bit of filling. I was able to make four layers for this cake. It is best practice to smooth out the layers with a knife before building the next.

Once you have filled up your loaf pan with all the layers, top your ice cream with one last layer of Brownie Brittle. I actually did not do this when I photographed this cake, but it would have been very helpful. Since you are inverting the cake after removing it from the pan, the additional layer of Brownie Brittle give your cake a stable base.

To cover the outside in the Cool Whip, you need to lift your icebox cake out of the freezer and invert it onto a plate. Quickly cover with the Cool Whip and return to the freezer for another couple of hours. If you don’t want the outside layer of Cool Whip, that is fine too! You can spoon it on top or skip it all together. I crumbled some more Brownie Brittle on top just for fun.

Side view of Brownie Brittle Icebox Cake on a platter showing layers of chocolate and cream

This icebox cake is also customizable in that you can use any flavor of Brownie Brittle you want. I used the Chocolate Chip flavor, but it would be great with the Salted Caramel flavor, and then you could even drizzle it with some caramel sauce. Man, my mouth is watering all over again!

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This post is sponsored by Brownie Brittle. All opinions are my own. I choose to work with brands that I love. 

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Brownie Brittle Icebox Cake

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  • Author: Julianne Dell
  • Prep Time: 15 mins
  • Total Time: 15 minutes
  • Yield: 8 slices


Chocolate lovers, this one is for you! This Brownie Brittle Icebox Cake is made with a no-churn brownie batter ice cream and Chocolate Chip Brownie Brittle. It is covered with a Cool Whip frosting.


  • 1 can Sweetened condensed milk (14 oz)
  • 1 C Brownie mix, dry
  • 2 containers Cool Whip (8 oz each), thawed
  • 3 bags Brownie Brittle (flavor of choice)
  • 1 C Mini chocolate chips


  1. In a large mixing bowl, combine sweetened condensed milk and dry brownie mix. Beat until well incorporated. Add thawed container of Cool Whip. Filling must be well mixed; use a spatula to overturn the mixture from the bottom to the top if necessary.
  2. To build the icebox cake, line your loaf pan with parchment paper or tin foil.
  3. Start building your layers by putting a layer of Brownie Brittle on the bottom of the pan. Try to fill in empty spaces with smaller pieces of Brownie Brittle.
  4. Alternate layers of Brownie Brittle with the ice cream base. You should be able to get four layers. Each layer is about one and a half cups of ice cream base.
  5. To finish the icebox cake, top it with Brownie Brittle. Freeze for a minimum of 4 hours.
  6. To cover with Cool Whip, remove the frozen icebox cake by lifting it out of the pan and inverting it onto a plate. Cover with Cool Whip and return to the freezer for another 2 hours until the Cool Whip freezes. You also have the option to spoon the Cool Whip onto the icebox cake instead.
  7. This icebox cake will thaw quickly! Slice immediately when removing from the freezer and return it to the freezer when you are not serving it.

Filed Under:

Brownie Brittle Recipes from my friends:

 Brownie Brittle Birthday Cake Icebox Cupcakes from Life Love and Sugar

No-Bake Brownie Brittle Toffee Cheesecake Bars from Shugary Sweets

 Brownie Brittle Toffee from Chocolate Chocolate and More

Other recipes you might like from Beyond Frosting

 Strawberry Brownie Brittle Icebox Cake 

 Brownie Brittle Grasshopper Pie

 Butterfinger Icebox Cake 

 Samoa Icebox Cake 

 Lemon Ice Cream Pie


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18 thoughts on “Brownie Brittle Icebox Cake”

  1. Avatar photo
    Lynne @ 365 Days of Baking and More

    Believe it or not, I have yet to make an Icebox Cake. This would be the perfect one to start with, too!
    I love the idea of putting the Brownie Brittle on the top which then becomes the bottom. I would just have left the ice cream as the final layer in the pan.

  2. This Brownie Brittle cake sounds amazing! Can you believe I still haven’t tried Brownie Brittle yet?! This makes me want to go try a bag asap.

  3. Avatar photo
    Erin @ Miss Scrambled Egg

    I’ve seen brownie brittle around in stores, but haven’t tried it yet. This looks like the perfect opportunity! ๐Ÿ˜€

  4. Dear Julianne, you icebox cake looks marvelous…each layer is so light and creamy. That slice is calling to me. xo, Catherine

  5. Avatar photo
    Diane (Created by Diane)

    How fun is this! I just love brownie brittle and this looks like the perfect recipe for summer!

  6. Avatar photo
    Miss @ Miss in the Kitchen

    This sounds amazing! I am so addicted to brownie brittle and I can’t wait to try it like this!

  7. Avatar photo
    Kimberly@The Little Girls Bakery

    This looks incredible! I love anything with brownies and this is a must -try!

  8. Avatar photo
    Beth @ bethcakes

    What a fabulous idea for brownie brittle! I’m totally going to have to try this mousse-like ice cream too. Ice box cakes are the best! ๐Ÿ™‚

  9. Avatar photo
    Megan - The Emotional Baker

    What a fun summer trip – I’m sure they love your cooking! & they’re going to devour this cake – it looks amazing ๐Ÿ™‚

  10. This is absolutely a perfect lake dessert, Julianne! I really want to try it now. What could possible be better after a hot day outdoors? I’m guessing this is mad addictive, too!