Chocolate Peanut Butter Cake

!For the milk chocolate layers

good-quality milk chocolate (coarsely chopped)

dark unsweetened cocoa powder

hot coffee

whole milk

all-purpose flour

baking soda

salt

unsalted butter (softened, cut into 1/2 inch cubes)

firmly packed dark brown sugar

granulated sugar

large eggs

vanilla extract

For the Peanut Butter Filling

unsalted butter, softened, cut into ½ inch cubes.

smooth peanut butter

plus 2 tablespoons confectioner's sugar (sifted)

vanilla

For the Peanut Butter Vanilla Frosting

granulated sugar

all-purpose flour

whole milk

heavy cream

unsalted butter, cool but not cold, cut into ½ inch cubes

plus 1 teaspoon Peanut Butter Filling

vanilla