Preheat oven to 350º. Spray or line cookie sheet.

In a bowl mix the flour, cocoa, b.Soda, b. Powder, salt . In a mixer cream together brown sugar & butter together. Mix in vanilla & egg. Add dry in ingredients & milk.Continue to mix until smooth. Scrap bowl.

Drop by 1/4 cup. ( I used a #20 scoop).onto your baking sheet leaving 1" space between cakes as they will grow. Bake 11-13 minutes. Remove from oven. Allow to Cool.

Once they are cool. Beat melted butter & peanut butter in a mixing bowl until smooth. Gradually mix in powered sugar & thick. Add in milk. Continue beating for 2 minutes until buttercream is spreadable & fluffy. Put some icing on one & then press another one on top.

This makes 10-12 pies.