heat oven to 350, beat chocolate cake mix with oil, eggs,
water, sour cream and pudding mix.
Grease and flour bundt pan, and pour half the batter into it,
Place the peanut butter in dollops in the center. Cover with
rest of batter.
Bake for 50 minutes, cool in pan turn out onto serving plate
to continue to cool.
For the icing beat the butter, cocoa, powder sugar, milk and
vanilla until smooth, ice the cake