This showstopping White Layer Cake with Fudgy Brownie is two layers of brownies, two layers of white cake, frosted with a beautiful buttercream rosette. I have the perfect decorator’s buttercream you can use to create a pretty design.

White Layer Cake with Brownie

If you look at the cake, it’s all about the lovely rose design using my decorator’s frosting. No one would know that it is made with box mixes of a cake and brownies! Yes, you could simply frost the cake with any kind of frosting, but don’t give up on the rosettes just yet. I have a full tutorial on how to make a rose cake.

Stunning rosettes cover this flavorful cake... white cake layers complemented with rich fudgey brownie deliciousness!

Cake Ingredients

Brownies: Grab a box of brownie mix (I like the fudge variety) to make the brownie layers.

Cake: All you need is a box of white cake mix that perfectly complements the brownies.

Stunning rosettes cover this flavorful cake... white cake layers complemented with rich fudgey brownie deliciousness!

How to Frost with Decorator’s Buttercream

  • Chill the cake before applying a thin crumb coat. This will help the crumbs to adhere better.
  • Once the crumb coat is applied, add a generous amount of buttercream for the final coat, creating a rose design as desired. Directions for How to Make a Rose Cake here.

Can I Use Different Frosting?

Sure! This cake is delicious even without any fancy designs. If you do not use decorator’s buttercream, try my American Buttercream, some easy frosting options, chocolate buttercream, or even store-bought frosting.

Stunning rosettes cover this flavorful cake... white cake layers complemented with rich fudgey brownie deliciousness!

Can I Make this Cake Without Box Mixes?

Definitely! If you are feeling up to it, this cake can definitely be made homemade. I recommend using my homemade brownie mix, along with my white cake recipe.

Can I Make this Cake in a Different Pan?

Sure. If you would like to make this white layered cake with fudgy brownie in a 9×13-inch baking dish, I recommend using the boxed mixes. I have not tested my homemade recipes in that size of a pan.

Stunning rosettes cover this flavorful cake... white cake layers complemented with rich fudgy brownie deliciousness!

How to Store White Layer Cake with Fudgy Brownies

To store the cake after frosting, cover it with a cake dome or a large bowl. It will last at room temperature for 4-5 days. If you have cut the cake, place plastic wrap against the cut side to keep the cake from drying out.

Stunning rosettes cover this flavorful cake... white cake layers complemented with rich fudgy brownie deliciousness!
4.65 from 34 votes

White Layer Cake with Fudgy Brownie

Prep Time 20 minutes
Cook Time 22 minutes
Total Time 42 minutes
This showstopping White Layer Cake with Fudgy Brownie is two layers of brownies, two layers of white cake, frosted with a beautiful buttercream rosette.

Ingredients

Instructions

  • Preheat the oven to 350°F. Line two 8-inch round cake pans with parchment paper and spray with nonstick cooking spray.
  • Prepare the brownie batter according to package instructions and divide evenly between the prepared cake pans.
  • Bake the brownies for 10 minutes.
  • While the brownies are baking, prepare the white cake batter according to package instructions.
  • Remove the partially baked brownies from the oven and evenly divide the white cake batter between the two pans, pouring it over the brownies.
  • Return the cake pans to the oven and bake for an additional 16-22 minutes, or until a toothpick inserted into the center comes out with crumbs but no wet batter. The cake should dome slightly and start to pull away from the sides of the pan.
  • Let the cake cool before adding the decorator's buttercream.

Notes

Here is the recipe for the frosting I used on this cake: Decorator’s Buttercream

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Meet Amanda Rettke

Amanda Rettke is the creator of I Am Baker, and the bestselling author of Surprise Inside Cakes: Amazing Cakes for Every Occasion – With a Little Something Extra Inside.Over the course of her 15+ year blogging adventure, she has been featured in and collaborated with the Food Network, New York Times, LA Times, Country Living Magazine, People Magazine, Epicurious, Brides, Romantic Homes, life:beautiful, Publishers Weekly, The Daily Mail, Star Tribune, The Globe and Mail, DailyCandy, YumSugar, The Knot, The Kitchn, and Parade, to name a few.

Reader Comments

  1. It tried the lemon instead of vanilla and I was amazed.. I think that will be my go to buttercream for now on.

    I love the brownie and white cake, always a hit with everyone.

    1. Hi, MaryAnn! I work with iambaker and am happy to help with questions. Yes, we used Crisco. Have a great day!

  2. Question. Do you leave the brownies in the pan, add the cake mix on top of brownies and continue to bake till cake is done. Or do you remove the brownies, then bake cake and assemble afterwards? Just want to make sure I bake it correctly.

  3. Can I use my home made brownies?
    I will need to double the recipe.They are baked in an 8 inch pan so will mine fit in the cake pan?

    Love your recipes!!

  4. I did this cake actually 3 of them for high school graduation party absolutely devine, I just frosted regular with some peaks I have to admit it come out beautifully. I got so many compliments on it I gave the credit to you as to where I got the recipe. Thank you so much, and to your great recipes.

  5. I was excited to try this for an early Father’s Day dinner, but ended up extremely disappointed! The baking time is far from accurate and I ended up with a less than acceptable cake. I had to add over 20 minutes of bake time to get the cake part finished and then the brownie was still under cooked! I usually have very little issues baking or just cooking in general, so I will try this again in the future with some moderations to a few of the steps and time.

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