Ultimate Black Chocolate Cake (Dark & Intensely Moist)

If you think standard chocolate cake is good, wait until you try the intense, deeply rich flavor of a true Black Chocolate Cake. This isn’t just a chocolate cake with black food coloring added; it is a meticulously crafted dessert that uses specialized ingredients to achieve a natural, stunning midnight-black color and a flavor that tastes exactly like the cookie part of an Oreo!

A tall slice of dark, almost black chocolate cake frosted with a smooth white vanilla buttercream on a plate. — *This stunning Black Chocolate Cake gets its midnight color naturally from heavily Dutch-processed black cocoa powder.*

What is it

A Black Chocolate Cake (sometimes called a Black Cocoa Cake or Black Velvet Cake) is an ultra-dark, fudgy cake that gets its signature color and flavor entirely from black cocoa powder . Black cocoa is a heavily Dutch-processed cocoa powder that has been treated with an alkaline solution to reduce acidity . This process not only darkens the cocoa to a striking charcoal black but also gives it a distinct, earthy, and intense chocolate flavor without the bitterness of standard natural cocoa .

Why you’ll love it

The Oreo Flavor: If you love the taste of chocolate sandwich cookies, this cake tastes exactly like a giant, soft Oreo .
No Food Coloring Needed: Achieving a true black cake usually requires an entire bottle of food coloring that stains your teeth. This cake relies 100% on natural cocoa for its striking midnight color.
Incredible Moisture: Because heavily Dutch-processed cocoa absorbs more liquid, this recipe uses hot coffee and oil to create a crumb that is dense, fudgy, and insanely moist .

Halloween or Elegant Parties: The dramatic black color makes it the perfect base for a spooky Halloween dessert or an elegant, modern wedding cake.

Ingredients

To make a standard two-layer 8-inch or 9-inch Black Chocolate Cake, you will need:

1 ¾ cups all-purpose flour

2 cups granulated sugar
¾ cup black cocoa powder (If you can’t find black cocoa, a dark Dutch-process cocoa like Hershey’s Special Dark will work, though the cake will be dark brown instead of black).
2 teaspoons baking soda

1 teaspoon baking powder
1 teaspoon kosher salt
½ cup vegetable oil (or canola oil)

1 cup buttermilk, at room temperature
2 large eggs, at room temperature
1 teaspoon pure vanilla extract

1 cup freshly brewed hot coffee (or boiling water)

(Note: You will also need a batch of your favorite Oreo Buttercream Frosting or Dark Chocolate Buttercream to frost the cake).

An overhead view of black chocolate cake ingredients featuring a prominent bowl of dark black cocoa powder alongside flour and eggs. — *Black cocoa powder is the secret ingredient that gives this cake its distinct color and rich Oreo-like flavor.*

How to make

Step 1: Whisk the Dry Ingredients
Preheat your oven to 350°F (175°C). Grease and line two 8-inch round cake pans with parchment paper. In a large mixing bowl, whisk together the flour, granulated sugar, black cocoa powder, baking soda, baking powder, and salt. Make sure to sift the black cocoa if it looks clumpy!

Step 2: Add the Wet Ingredients
In a separate medium bowl, whisk together the vegetable oil, room-temperature buttermilk, eggs, and vanilla extract until smooth. Pour the wet ingredients into the dry ingredients and mix on low speed (or by hand with a whisk) just until combined. The batter will look very thick.

Step 3: Bloom the Cocoa with Hot Coffee
Carefully pour the hot coffee into the batter. Whisk slowly until the batter is completely smooth and liquidy. The hot liquid “blooms” the black cocoa, releasing its intense flavor and helping it dissolve perfectly into the batter.

Step 4: Bake
Divide the thin batter evenly between the two prepared cake pans. Bake for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean. Let the cakes cool in their pans for 10 minutes before turning them out onto a wire rack to cool completely.

Pouring smooth, dark, liquidy black chocolate cake batter into a round baking pan lined with parchment paper. — *The hot coffee blooms the cocoa powder and creates a smooth, liquid batter that bakes up incredibly moist.*

How To Serve

Because of its intense Oreo-like flavor, this Black Chocolate Cake is absolutely phenomenal when paired with a stark white, fluffy Vanilla Frosting or an Espresso Cream Cheese Frosting for a mocha vibe. Frost the cooled cake layers, slice generous pieces, and serve alongside a cold glass of milk. It also makes a stunning visual contrast when topped with bright red strawberries or raspberries.

A close-up view of the dense, fudgy, dark crumb texture of a sliced black chocolate cake. — *The combination of oil and buttermilk ensures this dark chocolate cake stays dense, fudgy, and soft for days.*

How To Store

This cake retains its moisture exceptionally well thanks to the oil and buttermilk. If frosted with a standard buttercream, you can store the cake in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to a week.

To freeze the cake, wrap the unfrosted cake layers tightly in plastic wrap, then in a layer of aluminum foil. They will freeze beautifully for up to 3 months. Thaw them overnight in the refrigerator before frosting.

FAQs

Will black cocoa stain my teeth like black food coloring?
No! That is the beauty of using black cocoa. It provides a dramatic black color without dying your mouth or teeth like artificial food dyes do.

Can I use all natural cocoa powder instead?
You can, but it will completely change the recipe. Black cocoa has a different acidity level (pH) than natural cocoa powder. If you substitute natural cocoa, you are making a standard chocolate cake, and it will not have the signature dark color or Oreo flavor.

Why did my cake sink in the middle?
Cakes usually sink if the batter was overmixed (which develops too much gluten) or if the oven door was opened too early during baking. Make sure to whisk the hot coffee in just until smooth!

Note

Black cocoa powder contains almost no fat compared to standard cocoa powder, which can make baked goods dry if a recipe isn’t balanced properly. That is why this recipe uses vegetable oil and buttermilk instead of butter—they provide the necessary fat and moisture to keep the crumb ultra-soft!

Nutrition information

Serving Size: 1 slice (approx. 1/12 of unfrosted recipe)
Calories: 315 kcal

Carbohydrates: 45g
Protein: 4g
Fat: 14g

Saturated Fat: 2g
Sugar: 33g
Sodium: 380mg

Tips and Tricks

If you don’t want to use coffee, you can use boiling water. However, the coffee does not make the cake taste like coffee; it simply enhances and deepens the chocolate flavor.
To create the ultimate “Cookies and Cream” cake, crush some Oreos and sprinkle them between the cake layers before adding your frosting!
If you love dark, dramatic desserts, try using black cocoa powder to make a batch of Black Velvet Cupcakes or a rich Black Forest Swiss Cake!