Chocolate Peanut Butter Marble Brownies

These squares combine two of my favorite foods: chocolate and peanut butter. A match made in heaven! These squares are rich, sweet and decadent. They remind me of a Reese peanut butter cup. Here is the recipe, from another little baking booklet I found. This is the original, but I halved the recipe to make an 8x8 inch pan, which worked out very well. I also didn't bother with an electric mixer, I just mixed by hand. Dividing the batter in half sounds like a bit of a bother, but it is really easy to do.

Chocolate Peanut Butter Marble Brownies
1 cup butter, softened
1 1/3 cups granulated sugar
1 cup packed brown sugar
4 eggs
1/4 cup milk
1 1/3 cups all-purpose flour
1 tsp baking powder
1/2 cup creamy peanut butter
1 cup peanut butter baking chips
1/2 cup cocoa
1 cup semi-sweet chocolate chips

Cream butter, sugars, eggs and milk together on medium speed of an electric mixer until blended. Add flour and baking powder, mixing until smooth. Divide batter in half. Stir in peanut butter and peanut butter chips into one half. Stir cocoa and chocolate chips into other half. In greased 9x13 inch pan, alternate spoonfuls of batter in checkerboard pattern, using abut 8 spoonfuls of each. Swirl through batter to create a marble effect. Bake at 350◦F for 30-35 minutes or until set. Cool completely then cut into squares.