Rich Chocolate Cake With Chocolate Buttercream

Name: Rich Chocolate Cake With Chocolate Buttercream
Prep time: 30 min
Cook time: 35 min
Total time: 1 h 5 min
Yield: 12 servings
Ingredients: 1 3/4 cups all-purpose flour; 3/4 cup unsweetened cocoa powder; 2 cups granulated sugar; 1 1/2 teaspoons baking powder; 1 1/2 teaspoons baking soda; 1 teaspoon salt; 2 large eggs; 1 cup whole milk; 1/2 cup vegetable oil; 2 teaspoons vanilla extract; 1 cup boiling water; 1 cup unsalted butter, softened; 3 1/2 cups powdered sugar; 1/2 cup unsweetened cocoa powder; 1/4 cup whole milk; 1 teaspoon vanilla extract

Highlighted under: Classic Food

I absolutely love baking, and this Rich Chocolate Cake with Chocolate Buttercream is one of my all-time favorites. Every layer of this cake is packed with intense chocolate flavor and a moist, tender crumb that has everyone coming back for seconds. The smooth chocolate buttercream icing is the perfect complement, rich and creamy without being overly sweet. Whether it's a birthday celebration or just a cozy family dinner, this cake never fails to impress and satisfies every chocolate craving.

Created by

Yasmin Thornton

Last updated on 2026-03-05T07:09:53.789Z

When I first made this chocolate cake, I knew I wanted something that was not just rich in flavor but also had a texture that felt indulgent. After several trials, I discovered the perfect balance of cocoa powder and chocolate melted into the batter, which truly elevates the taste. The result is a cake that is deeply satisfying.

While the cake is cooling, I whip up the chocolate buttercream with high-quality cocoa and unsalted butter. I learned that sifting the cocoa powder makes a significant difference in the final texture, giving a smooth, velvety finish that’s just divine. This tip has transformed my buttercream and always garners compliments.

Why You'll Love This Cake

Rich chocolate flavor paired with fresh orange zest
Creamy texture that melts in your mouth
Perfect for celebrations or as a sweet indulgence

Understanding the Ingredients

The combination of all-purpose flour and unsweetened cocoa powder forms the backbone of this Rich Chocolate Cake. The flour provides structure, while the cocoa offers deep chocolate notes. Opt for high-quality cocoa powder for the most intense flavor and color. I recommend Dutch-processed cocoa for a smoother taste, but if you only have natural cocoa, it will still work beautifully, just remember to adjust the baking soda slightly since Dutch cocoa is treated for acidity.

When it comes to sugar, the granulated variety not only sweetens but also contributes to the cake's moistness. This cake relies on a balance between sugar and fat, so don't consider cutting back too much, or you risk a dry cake. Meanwhile, the addition of eggs is vital; they help bind the ingredients, adding richness and moisture. For a substitute, you can use flax eggs or applesauce if you're going vegan, but be aware this will alter the texture slightly.

Baking and Cooling Tips

Baking times are crucial for achieving that perfect, moist texture without undercooking. I recommend checking the cake at around 30 minutes by inserting a toothpick in the center. If it comes out clean or with just a few moist crumbs, your cakes are ready. However, if it comes out with wet batter, give it an additional 3 to 5 minutes. Also, make sure your oven is properly preheated; I find that using an oven thermometer helps maintain an accurate temperature.

Cooling the cakes properly is just as important. After you take the cakes out of the oven, allow them to cool in the pans for about 10 minutes before transferring them to a wire rack. This allows the structure to set a bit more, reducing the risk of breaking when you flip them out. If you notice any doming on the tops, trim it off with a serrated knife for easier stacking and a level cake.

Ingredients for Rich Chocolate Cake

For the Cake

1 3/4 cups all-purpose flour
3/4 cup unsweetened cocoa powder
2 cups granulated sugar
1 1/2 teaspoons baking powder
1 1/2 teaspoons baking soda
1 teaspoon salt
2 large eggs
1 cup whole milk
1/2 cup vegetable oil
2 teaspoons vanilla extract
1 cup boiling water

For the Chocolate Buttercream

1 cup unsalted butter, softened
3 1/2 cups powdered sugar
1/2 cup unsweetened cocoa powder
1/4 cup whole milk
1 teaspoon vanilla extract

Preparation Instructions

Steps to Make the Cake

Preheat the Oven

Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.

Mix Dry Ingredients

In a large bowl, sift together flour, cocoa powder, sugar, baking powder, baking soda, and salt.

Combine Wet Ingredients

Add eggs, milk, oil, and vanilla to the dry ingredients. Beat on medium speed for 2 minutes.

Add Boiling Water

Stir in boiling water (batter will be thin). Pour the batter evenly into prepared pans.

Bake the Cake

Bake for 30 to 35 minutes or until a toothpick inserted comes out clean. Cool for 10 minutes in pans, then remove to a wire rack.

Make the Buttercream

In a medium bowl, beat together the butter, powdered sugar, and cocoa powder until smooth. Add milk and vanilla; beat until fluffy.

Assemble the Cake

Once the cake is completely cool, spread a layer of buttercream on the top of one cake layer, place the second layer on top, and frost the top and sides.

Decorate and Serve

Decorate with chocolate shavings or sprinkles, if desired. Slice and enjoy!

Enjoy Your Cake!

Pro Tips

For the best results, use high-quality cocoa powder and let the cake cool completely before frosting to prevent the buttercream from melting.

Buttercream Mastery

For the chocolate buttercream, ensure your butter is at a perfect room temperature—soft but not melting. This will help in achieving that fluffy texture. Start beating the butter alone for a minute or two before adding the sugar and cocoa. This creates a creamy base that will hold up better when you add liquid ingredients like milk and vanilla. If your buttercream feels too thick, add milk a tablespoon at a time until you reach the desired consistency for easy spreading.

A common mistake with buttercream is not sifting the powdered sugar before mixing. It can lead to a grainy texture that’s hard to get rid of. I always sift to ensure a smooth, silky finish. Once combined, beat on medium to high speed for several minutes until it's fluffy and light in color. You'll know it’s ready when it holds peaks but is still spreadable.

Serving Suggestions and Variations

When serving this cake, consider dusting it with cocoa powder or adding a sprinkle of flaky sea salt for a sophisticated touch. Chocolate shavings can add visual appeal and extra richness. If you want to elevate the flavors, try pairing slices with a dollop of homemade whipped cream or a scoop of vanilla ice cream, which balances the cake’s richness perfectly.

This cake works beautifully as a base for various flavor profiles. Experiment by adding a teaspoon of espresso powder to the batter for a subtle mocha flavor, or fold in some mini chocolate chips for added texture. For a citrus twist, incorporate a bit of orange zest into the buttercream for a delightful contrast. To make it ahead, the cake portions can be frozen; just wrap them tightly in plastic wrap, then aluminum foil, and store for up to three months.

Questions About Recipes

→ Can I use a different type of flour?

Yes, you can use cake flour for a lighter texture, but the proportions may need adjustment.

→ How long does this cake last?

The cake can last up to 3 days at room temperature, or you can refrigerate it for up to a week.

→ Can I freeze the cake?

Absolutely! The un-frosted cake layers can be wrapped in plastic wrap and frozen for up to 3 months.

→ What can I use instead of eggs?

You can substitute each egg with 1/4 cup of applesauce or a flaxseed meal mixed with water.