Here's the recipe for that amazing cake-straight from the baker, Denise:
Chocolate Peanut Butter Cake-
makes 8 inch triple layer cake
2 cups flour 2 1/2c sugar 3/4c cocoa powder 2t baking soda 1t salt
Combine well and then add:1c oil 1c sour cream 1 1/2c water 2T white vinegar 1t vanilla 2 eggs. Mix well and add to 3 greased cake pans. Bake at 350* for 30-35 minutes.
Cool 20 minutes and remove from pans (these cakes are very very soft- firm up in the freezer 30 minutes before frosting).
Pnut butter frosting: 10 oz cream cheese 1 stick buttercream and then add:5 cups powdered sugar 1 1/2 pnut butter mix all until creamy. I added a splash of milk to make it easier to spread.Spread between the layers and then frost very thin layer over whole cake.
Freeze 30 minutes to chill and then finish frosing with a thick layer (this way no dark crumbs show)
Chocolate Pnut Butter Ganache: 8 oz semisweet chocolate (I for some reason was completely out of choc chips so used leftover dark Hershey kisses from Vday)3T pnut butter 2T corn syurp. Heat in microwave or over double boiler until melted and smooth-whisk in 1/2 cup milk.
Spread on top of cake and allow it to drip down the sides. Refrigerate for 30 minutes to set. Remove 30 minutes before serving. Serve with a JUG of milk!!!