8 tablespoons (1 stick) butter, melted,
Plus 8 more tablespoons (1 stick) butter, melted,
Plus additional butter, for greasing pan
1 (18.25-ounce) package chocolate cake mix
1 egg, plus 2 eggs
1 (8-ounce) package cream cheese, softened
3 to 4 tablespoons cocoa powder
1 (16-ounce) box powdered sugar
1 teaspoon vanilla extract
Heat oven to 350 degrees (325 convection) and prepare and 9-inch round cake pan.
Combine the cake mix, 1 egg, and 1 stick melted butter, and stir until well blended. Pat the mixture into prepared cake pan and set aside.
In a stand mixer on medium speed, beat the cream cheese until smooth. Add the remaining 2 eggs, and the cocoa powder.
Lower the speed of the mixer and add the powdered sugar. Mix until everything is well combined. Slowly add the remaining 1 stick of melted butter and vanilla and continue to beat the mixture until smooth.
Pour filling over cake mixture in pan. Bake for 40 to 50 minutes. Be careful not to overcook the cake; the center should still be a little gooey when finished baking. Let cake partially cool on a wire rack before cutting into pieces.