If you like peanut butter you will love these brownies... kids love them too!
In a mixing bowl, combine butter and sugars.
Add eggs and milk; mix well.
Combine flour, baking powder, and salt; add to creamed mixture and mix well.
Divide batter in half.
To one portion, add peanut butter and peanut butter chips.
To the other portion, add cocoa and chocolate chips; mix well.
In a greased 9-inch square pan, spoon chololate batter into 8 mounds in a checker board pattern.
Spoon 8 mounds of peanut butter batter in between the chocolate batter.
Cut through batter with a knife to swirl.
Bake at 350F for 25-30 minutes or until toothpick interted near the center comes out clean.
Cool on a wire rack.
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