How do you make marange?

For the cake layers:

* 1 1/2 cups all-purpose flour

* 1 1/2 cups granulated sugar

* 1 1/2 teaspoons baking powder

* 1 1/2 teaspoons baking soda

* 1 1/2 teaspoons salt

* 1 cup unsalted butter, softened

* 1 cup vegetable oil

* 3 large eggs

* 3 egg yolks

* 1 teaspoon vanilla extract

* 1 cup hot coffee

For the ganache:

* 8 ounces semisweet chocolate, finely chopped

* 1 cup heavy cream

For the frosting:

* 4 cups powdered sugar

* 1/2 cup unsalted butter, softened

* 3/4 cup peanut butter

* 3/4 cup heavy cream

* 1 teaspoon vanilla extract

Instructions:

To make the cake layers:

1. Preheat oven to 350 degrees F (175 degrees C). Grease and flour three 9-inch round cake pans.

2. In a medium bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.

3. In the bowl of a stand mixer fitted with the paddle attachment, cream together the butter and oil until light and fluffy. Add the eggs and egg yolks one at a time, beating well after each addition. Beat in the vanilla extract.

4. Add the dry ingredients to the wet ingredients alternately with the hot coffee, beginning and ending with the dry ingredients. Divide the batter evenly between the prepared cake pans and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.

5. Allow the cakes to cool completely in the pans before frosting.

To make the ganache:

1. Place the chocolate in a heatproof bowl.

2. In a small saucepan, bring the heavy cream to a simmer over medium heat. Pour the hot cream over the chocolate and let sit for 5 minutes, until the chocolate is melted.

3. Stir until smooth. Allow the ganache to cool completely before using.

To make the frosting:

1. In the bowl of a stand mixer fitted with the paddle attachment, cream together the powdered sugar and butter until light and fluffy. Add the peanut butter, heavy cream, and vanilla extract and beat until smooth.

To assemble the cake:

1. Place one of the cake layers on a serving plate.

2. Spread a layer of the ganache evenly over the cake layer.

3. Top with another cake layer, and repeat the process.

4. Place the third cake layer on top, and frost the entire cake with the remaining peanut butter frosting.

5. Decorate with additional chopped peanuts if desired.

6. Refrigerate for at least 1 hour before serving.