If you love rich, dark chocolate desserts, this Black Cocoa Cake will quickly become a favorite. With its deep black color and bold, bittersweet flavor, this cake stands out as a showstopper for any occasion. It’s incredibly moist thanks to buttermilk and coffee, with a soft crumb that pairs perfectly with a silky black cocoa frosting. Whether you’re baking for a celebration or simply craving something indulgent, this cake brings a bakery-quality experience right to your kitchen.

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Why You’ll Love This Black Cocoa Cake

This recipe delivers intense chocolate flavor with a smooth, velvety texture. Black cocoa powder gives the cake a striking appearance and a sophisticated taste that’s less sweet and more refined than traditional chocolate cake. It’s simple to make, requires no special equipment, and the combination of coffee and cocoa enhances the deep flavor beautifully.

Ingredients You’ll Need

For the cake, you’ll use cake flour, black cocoa powder, sugar, baking soda, baking powder, salt, vegetable oil, eggs, vanilla, buttermilk, and hot coffee.

The frosting calls for butter, powdered sugar, black cocoa powder, milk, and vanilla extract. Each ingredient plays an important role in creating a perfectly moist, flavorful, and balanced cake.

Success Tips

Use room temperature ingredients: This helps the batter mix evenly and results in a lighter, fluffier cake.
Don’t overmix: Once you add the wet ingredients, mix just until combined to avoid a dense texture.
Hot coffee matters: The heat helps bloom the cocoa, intensifying its flavor and creating a richer chocolate taste.
Cool completely before frosting: The cake should be fully cooled to prevent the frosting from melting.

All About the Ingredients

Black Cocoa Powder: This ultra-dark cocoa has a mellow, Oreo-like flavor. It’s less acidic than regular cocoa and adds dramatic color. If you don’t have black cocoa, use a mix of Dutch-process cocoa and a small amount of black cocoa to maintain both flavor and color.
Cake Flour: Creates a fine, tender crumb that balances the rich flavor of the cocoa. If you only have all-purpose flour, remove 2 tablespoons per cup and replace with cornstarch.
Buttermilk: Adds tang and moisture, ensuring a soft, rich texture. If you don’t have buttermilk, mix milk with a small amount of vinegar or lemon juice as a quick substitute.
Hot Coffee: Enhances chocolate flavor without making the cake taste like coffee. Hot water can be used if preferred, but coffee brings depth.
Vegetable Oil: Keeps the cake moist even after refrigeration.
Butter in Frosting: Provides a creamy base that pairs beautifully with the bittersweet cocoa. For a dairy-free option, use a plant-based butter substitute.

Using All-Purpose Flour Instead of Cake Flour

If you don’t have cake flour on hand, you can easily make a substitute using all-purpose flour. Cake flour gives baked goods a soft, tender crumb because it has a lower protein content, which produces less gluten. To create a similar texture, measure one cup of all-purpose flour, remove two tablespoons of it, and replace those two tablespoons with cornstarch. Sift the mixture a few times to evenly distribute the cornstarch. This simple swap helps lighten the structure of your cake so it stays soft and delicate while maintaining great flavor.

Variations to Try

Layer Cake: Split the batter between two 8-inch pans for a classic layered look.
Cupcakes: Divide the batter into lined muffin tins and bake for 18–20 minutes.
Add-ins: Stir in chocolate chips for extra richness or top with a drizzle of chocolate ganache for a glossy finish.
Frosting Flavors: Try a cream cheese frosting or peanut butter frosting to balance the dark chocolate flavor.

Storage Tips

Store the frosted cake at room temperature for up to two days, or refrigerate for up to five. Cover it tightly to prevent drying out. For longer storage, wrap slices individually and freeze for up to three months. Thaw at room temperature before serving.

FAQ

What is black cocoa powder?

Black cocoa powder is a highly processed, Dutch-style cocoa that’s very dark in color and has a smooth, almost bittersweet flavor similar to the chocolate cookies in Oreo cookies.

Can I substitute regular cocoa powder?

Yes, but the flavor and color will change. The cake will be lighter and taste more like a traditional chocolate cake.

Does the coffee make the cake taste like coffee?

No, it simply deepens the chocolate flavor. If you prefer, use hot water instead.

Can I make this cake ahead of time?

Yes, the cake layers can be baked a day in advance and stored tightly wrapped at room temperature. Frost before serving for best texture.

Can I use all-purpose flour instead of cake flour in this Black Cocoa Cake?

Yes, you can. To make a cake flour substitute, measure one cup of all-purpose flour, remove two tablespoons, and replace them with two tablespoons of cornstarch. Sift the mixture several times to ensure it’s evenly combined. This helps create a lighter texture closer to what you’d get using real cake flour. The cake will still taste delicious and have a moist, tender crumb.

Elizabeth

Black Cocoa Cake and Frosting

This Black Cocoa Cake is rich, dark, and beautifully moist with a deep, bittersweet chocolate flavor. Made with black cocoa powder, buttermilk, and hot coffee, it’s an elegant twist on classic chocolate cake.

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Prep Time 20

Cook Time 30

Cooling Time 1

Total Time 1 50

Servings: 12

Course: Dessert

Ingredients Equipment Method Notes

Ingredients

Black Cocoa Cake:
1 and 3/4 cups cake flour
3/4 cup black cocoa powder
1 and 3/4 cups sugar
2 teaspoons baking soda
1 teaspoon baking powder
1 teaspoon salt
1/2 cup vegetable oil
2 large eggs
2 teaspoons pure vanilla extract
1 cup buttermilk
1 cup hot coffee
Black Cocoa Frosting:
1 1/2 sticks butter
1 3/4 cups powdered sugar
1/3 cup back cocoa powder
2-3 TbspTbsp milk
2 teaspoons vanilla extract

Equipment

2 mixing bowls
1 set Measuring Cups and Spoons
2 spatulas
1 stand mixer with paddle attachment
1 9×13 pan

Method

Preheat the oven to 350°F. Grease and flour your cake pan(s) or line with parchment paper.
In a large mixing bowl, whisk together cake flour, black cocoa powder, sugar, baking soda, baking powder, and salt.
Add vegetable oil, eggs, vanilla, and buttermilk to the dry ingredients and mix until just combined.
Slowly pour in the hot coffee while mixing on low speed. The batter will be thin, which is normal.
Divide the batter evenly between the prepared pans or pour into a single pan.
Bake for 30 to 35 minutes, or until a toothpick inserted in the center comes out clean.
Allow the cakes to cool in the pan for 10 minutes, then transfer to a cooling rack to cool completely before frosting.
In a medium bowl, beat butter until smooth and creamy.
Add powdered sugar and black cocoa powder, mixing on low speed until combined.
Pour in milk and vanilla extract, then beat on high until light and fluffy.
Spread frosting evenly over the cooled cake.

Notes

• The batter will be thinner than most cake batters, but this helps create a soft, moist texture.

• Using hot coffee enhances the chocolate flavor, but you can use hot water if preferred.

• Make sure the cake is completely cool before frosting to prevent the butter from melting.

• Black cocoa powder gives the cake a very dark color and mild chocolate flavor. If you want a stronger chocolate taste, mix half black cocoa and half Dutch-process cocoa.

• For a more dramatic look, top with chocolate shavings or a light dusting of cocoa powder.

• If you don’t have cake flour, you can make your own by measuring one cup of all-purpose flour, removing two tablespoons, and replacing them with two tablespoons of cornstarch. Sift well before using. This simple substitute helps create the same light, tender texture in your Black Cocoa Cake.