Peanut Butter Brownies

These are a delicious chocolate brownie swirled with peanut butter then topped with chocolate frosting.   The recipe makes a 13" x 9" pan but can easily be halved for a smaller amount. 

For the chocolate brownie:
Beat together until creamy:
1 1/2 c. sugar
1 c. butter
Then beat in
2 t. vanilla
Beat in 4 eggs one at a time.  Add to bowl
3/4 c. cocoa
1 t. baking powder
1/2 t. salt
1 1/2 c. flour
Beat slowly at first then beat on higher speed to mix well.  Stir in
1 c. chocolate or peanut butter chips.

For the peanut butter layer:
Beat together until creamy:
3/4 c. peanut butter
1/3 c. butter
1/3 c. sugar
Then beat in
2 eggs
Beat in  3/4 t. vanilla
2 eggs
Beat until well mixed

Spray a 13" x 9" baking dish with cooking spray.  Spread half of the chocolate batter in the pan.
Then top that layer with all of the peanut butter mixture, spreading to cover the chocolate layer.
Next, top the peanut butter layer with the remaining chocolate dough.  Using a knife, cut through the layers horizontally and then vertically to marble.  Bake at 350 degrees for 40 minutes.  Allow to cool before frosting.

Frosting
3 oz. chocolate, melted
3  T. butter
2 2/3 c. powdered sugar
3/4 t. vanilla
4-5 T. water or milk
Beat all ingredients well.  Frost on brownies when cool.