Preheat the oven to 350 degrees. Grease
and lightly flour 12 individual (about 1 cup size) bundt tins.
In the bowl of an electric mixer
, fitted with a paddle, cream
the butter and sugar together. In a small mixing bowl, sift
together the flour, baking powder, baking soda and salt and set aside. Add the eggs
, one at a time, to the butter mixture. Mix well after each egg. Add the chocolate and vanilla. Mix well. Add the sifted flour mixture, 1/2 cup at a time, alternating with the milk. Mix well. Fill each tin 1/2 full with the batter. Place some of the peanut butter
chips in the center of the batter
. Pour the remaining batter over the chips
. Place in the oven and cook for about 18 to 20 minutes. Remove from the oven and cool for a couple of minutes in the pan. Invert the cakes
onto a wire rack. In a small mixing bowl, combine the cocoa powder, powdered sugar
and milk. Mix until smooth. Spoon some of the glaze over each bundt cake. Allow the glaze
to set, then serve.