Chocolate Cake with Chocolate Buttercream Frosting


Here you have it, my new favorite chocolate cake! I’ve made three chocolate cakes this week (and believe it or not I’m still not sick of chocolate cake) but I’ve been on a mission to create my idea of the best chocolate cake.

I already have my favorite chocolate frosting that will likely never be replaced so that part was easy, but my old favorite chocolate cake is now just that, an old favorite. I wanted a cake with a little more chocolate (or cocoa anyway), so I decided it was time to create my own chocolate cake recipe.

Chocolate Cake with Chocolate Buttercream Frosting | Cooking Classy

Here’s the rundown in what I’m looking for in a chocolate cake:

  • Chocolate flavor. This cake, loaded with it. The boiling water intensifies the chocolate flavor of the cocoa. I’m starting to think it’s a must for all chocolate cakes.
  • Moisture. We all hate dry cakes. I like mine really moist. This one, check.
  • Crumb texture. Is it soft? Is it fluffy or dense? Does it have stability? Soft is definitely a must and I like my chocolate cake somewhere between fluffy and dense. I’m not a big fan of the chocolate cakes that are so fluffy they just crumble apart and don’t have much structure but I also don’t want it so dense that it’s like eating a cheesecake.
  • Perfect frosting. An incredible frosting is just as important as a good cake. It is going to crown the cake after all. This frosting is likely the best chocolate frosting you’ll ever make. Just sayin :).

I really hope you love this chocolate cake as much as I do. Find a reason to celebrate and enjoy!

Chocolate Cake with Chocolate Buttercream Frosting | Cooking ClassyChocolate Cake with Chocolate Buttercream Frosting | Cooking Classy

Remember to subscribe to the Cooking Classy newsletter to receive new recipe notifications delivered to your inbox!

Follow Cooking Classy on Facebook | Instagram | Pinterest | Twitter for all of the latest updates, recipes and content.


Chocolate Cake with Chocolate Buttercream Frosting

5 from 1 vote

A perfectly decadent, rich chocolate cake. It has the perfect texture, a moist crumb, an abundance of chocolate flavor and its finished with an tempting, creamy chocolate buttercream.

Servings: 16
Prep Time 30 minutes
Cook Time 30 minutes
Total Time 2 hours


  • 1 1/2 cups granulated sugar
  • 1/2 cup packed light-brown sugar
  • 3/4 cup unsweetened cocoa powder
  • 1 tsp baking soda
  • 3/4 tsp salt
  • 1 cup boiling water
  • 3/4 cup canola oil
  • 2 large eggs
  • 3 large egg yolks
  • 1 Tbsp vanilla extract
  • 2 cups all-purpose flour
  • 1/3 cup milk
  • 1/3 cup sour cream

Chocolate Buttercream Frosting

  • 1 1/2 cups butter , at room temperature (I like to use 1 cup unsalted and 1/2 cup salted)
  • 3 3/4 cups + 2 Tbsp powdered sugar
  • 1/2 cup + 2 Tbsp cocoa powder
  • 3 - 4 Tbsp heavy cream
  • 1 tsp vanilla extract


  1. For the cake:
  2. Preheat oven to 350 degrees. Butter two 9-inch round cake pans then line bottom of each with a round of parchment paper. Butter parchment paper and set aside.
  3. In a large, heat proof mixing bowl, whisk together granulated sugar and brown sugar (lumps are fine), then whisk in cocoa powder, baking soda and salt. Carefully pour boiling water in to cocoa mixture and immediately whisk to blend well, about 15 - 20 seconds. Allow to cool 5 minutes.
  4. Using an electric hand mixer set on low speed blend in canola oil until combined, about 10 seconds. Add eggs to cocoa mixture and blend on low speed just until combined, about 5 seconds. Add egg yolks and vanilla extract and blend just to combined. Then add flour and blend only until combined and finish by blending in milk and sour cream just until combined.
  5. Divide mixture evenly among 2 prepared pans. Bake in preheated oven until toothpick inserted into center of cake comes out clean or with a few moist crumbs, about 29 - 34 minutes. Allow to cool in pan 5 minutes, run butter knife around edge of cake and invert onto a wire rack and allow to cool completely (after about 20 minutes of cooling, I placed the cakes into an airtight container to seal in moisture while they finished cooling).
  6. Trim tops from cake to form an even layer (they are quite domed so you don't need to make it completely level across - just add a little more frosting to the edges that aren't as level so you don't have to cut off so much cake). Add frosting to top of one round then top with second cake and frost top and sides of cake. Store in an airtight container.
  7. For the chocolate buttercream frosting:
  8. In a the bowl of an electric stand mixer, fitted with whisk attachment (paddle attachment works too. Whichever you use just pay attention the the shade of the butter), whip butter on moderately high speed until very pale and fluffy (nearly white in color), about 6 - 8 minutes, occasionally scraping down sides of the bowl. Sift in cocoa powder then add in powdered sugar, 3 Tbsp heavy cream and vanilla and mix on low speed until combine, scrapping down the sides of the bowl as needed and adding up to 1 tbsp additional cream to thin if desired. Increase mixer to medium-high speed and whip mixture until pale and very fluffy about 4 - 5 minutes, occasionally scraping down sides of the bowl.
  9. Note that similar to whipped cream the frosting will lose some of its "fluff" after a few hours, it will still taste the same it just loses some of the air that was whipped into it (similar to whipped cream how it loses it's stabilization after a few hours). It is best to prepare and use within a few hours for best (fluffiest) results.
  10. Recipe Source: Cooking Classy
Course: Dessert
Cuisine: American
Keyword: Chocolate Cake
Author: Jaclyn
Chocolate Cake with Chocolate Buttercream Frosting | Cooking Classy


  • Jessica: I absolutely love your recipes! Could I possibly sub butter for the canola oil? I plan to make cake pops and oil makes them slip off the sticks. March 29, 2019 at 8:02am Reply

    • Jaclyn: Without further testing I can’t say for sure. The cake may end up dry. I might try a chocolate sheet cake as those are usually butter based. So glad you like my recipes :)! March 29, 2019 at 8:04pm Reply

  • Jennifer: I dont have an electric stand mixer. Could i use an electric hand mixer for the frosting February 6, 2019 at 1:40pm Reply

    • Jaclyn: Yes that will work great too, it just takes a bit more mixing. Hope you enjoy! February 6, 2019 at 4:22pm Reply

  • Caitlin Veteto: I made this cake for my aunt and uncle’s 40th wedding anniversary party. It received rave reviews. I used natural cocoa for the cake and 50/50 natural and dutched for the frosting. The cake and the frosting are the right level of sweet. The layers did dome a little. They also set firm enough to make them easy to handle. The frosting is delicious, but challenging for a cake that was iced the night before and moved. It doesn’t set up and crust. I think that is because it has more butter to sugar/cocoa than some. Just had to be extra careful with the temperature it was kept at (summer here in Oklahoma.) I have tried several chocolate cakes looking for a scratch recipe. This is only one I would make again. Thanks! July 8, 2018 at 7:43pm Reply

    • Jaclyn: So glad it was enjoyed! Thanks for commenting! July 9, 2018 at 10:54am Reply

  • Pheen: I’ve made your red velvet cake which was amazing. Wanted to ask of this has a similar crumb texture and moisture as the red velvet? February 23, 2018 at 10:29pm Reply

Add your comment:

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Copyright 2011-2019 Cooking Classy | Privacy Policy
Design by cre8d