Ingredients
Scale
Chocolate Cake
- 1¾ cups (210 g) all-purpose flour
- 1¾ cups (350 g) granulated sugar
- ¾ cup (64 g) unsweetened cocoa powder
- 1½ teaspoons baking powder
- 1½ teaspoons baking soda
- ½ teaspoon fine salt
- 2 large eggs, room temperature
- 1 cup (240 ml) whole milk, room temperature
- ½ cup (120 ml) neutral vegetable oil
- 2 teaspoons vanilla extract
- 1 cup (240 ml) hot coffee or hot water
Peanut Butter Cream Filling
- 8 oz (226 g) full-fat block cream cheese, softened
- ¾ cup (190 g) regular creamy peanut butter
- ¾ cup (90 g) powdered sugar, sifted
- 1 teaspoon vanilla extract
- 1 cup (240 ml) cold heavy whipping cream
Chocolate Frosting
- 1½ cups (340 g) unsalted butter, softened
- ¾ cup (64 g) unsweetened cocoa powder, sifted
- 4 cups (480 g) powdered sugar, sifted
- ½ cup (120 ml) heavy cream, plus more only if needed
- 2 teaspoons vanilla extract
- Pinch of fine salt
Chocolate Ganache
- 6 oz (170 g) semi-sweet chocolate, finely chopped
- ½ cup (120 ml) heavy cream
Decoration
- ½ cup (about 70 g) roasted unsalted peanuts, roughly chopped
- 2 oz (57 g) semi-sweet chocolate, shaved or curled
- Reserved chocolate frosting for piping
Instructions
- Prepare the pans. Preheat the oven to 350°F (175°C). Grease two 9-inch round cake pans. Line the bottoms with parchment paper and lightly grease the parchment.
- Combine the dry ingredients. Whisk flour, sugar, cocoa powder, baking powder, baking soda, and salt in a large bowl. Break up all cocoa lumps.
- Make the batter. Add eggs, milk, oil, and vanilla. Mix only until combined. Slowly pour in the hot coffee while mixing on low. The batter will be thin; this is normal.
- Bake. Divide the batter evenly between the pans. Bake for 28–32 minutes. Begin checking at 27–28 minutes. The cakes are ready when the centers spring back lightly and a toothpick comes out with a few moist crumbs rather than wet batter.
- Cool completely. Leave the cakes in their pans for 10 minutes. Turn them onto wire racks, remove the parchment, and cool completely before filling. Do not assemble warm layers.
- Prepare the peanut butter filling. Beat softened cream cheese and creamy peanut butter until smooth. Add powdered sugar and vanilla. In a separate chilled bowl, whip the cold heavy cream to stiff peaks. Fold one-third into the peanut butter mixture, then gently fold in the remainder. Chill for 15–20 minutes if the filling seems too soft.
- Make the chocolate frosting. Beat the butter until creamy. Mix in cocoa. Gradually add powdered sugar. Add vanilla, salt, and enough heavy cream to create a smooth frosting that spreads easily but still holds a piped swirl.
- Fill the cake. Place the first cooled layer on a cake plate. Pipe a ring of chocolate frosting around its outer edge to form a dam. Spread the peanut butter cream inside the dam. Add the second layer and press very gently.
- Crumb coat. Cover the cake with a thin coat of chocolate frosting. Refrigerate for 15–20 minutes.
- Finish frosting. Apply the remaining frosting over the top and sides. Leave subtle spatula marks for a natural homemade finish.
- Make the ganache. Place chopped chocolate in a bowl. Heat the cream until steaming. Pour it over the chocolate and leave for 2 minutes. Stir until glossy. Let the ganache cool until slightly thickened before adding it to the cake.
- Decorate. Spread ganache across the top and create a few controlled drips. Pipe chocolate frosting swirls around the top. Add chopped roasted peanuts and irregular chocolate curls.
- Chill before slicing. Refrigerate the completed cake for 1–2 hours. For clean slices, warm a sharp knife, dry it, cut straight down, and wipe the blade between cuts.
Notes
- Use regular creamy peanut butter, not very runny natural peanut butter.
- Full-fat block cream cheese gives the filling better structure.
- Heavy whipping cream must be cold before whipping.
- Cake layers must be completely cool before assembly.
- The chocolate frosting dam helps stop the peanut butter filling from squeezing out.
- Do not add extra flour because the chocolate batter looks thin.
- Do not pour hot ganache over the buttercream. Let it cool until it is fluid but no longer hot.
- If the assembled cake feels unstable, chill it before applying the final frosting.
- For the clean cross-section shown in the finished cake, chill for at least 1 hour before slicing.
- Contains peanuts, dairy, eggs, wheat, and potentially soy, depending on the chocolate and peanut butter brands used.
- Prep Time: 45 minutes
- Additional Time / Chill & Cooling Time:: 2 hours 30 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
