2-1/4 c. all purpose flour
2 c. light brown sugar
1 c. creamy peanut butter
1/2 c. unsalted butter, softened
1 t. baking powder
1/2 t. baking soda
1 c. milk
1 t. vanilla extract
1 c. semisweet chocolate chips (I prefer to use milk chocolate)
Preheat oven to 350 degrees. Coat a 9"x13" baking pan with cooking spray. Set aside.
Using an electric mixer, combine flour, brown sugar, peanut butter, and butter. Remove 1 cup of mixture and set aside.
Mix in baking powder, and baking soda. Mix in milk and vanilla. Add eggs, 1 at a time, mixing well after each addition.
Transfer batter to prepared pan. Sprinkle top with reserved flower mixutre and chocolate chips. Bake 35-40 minutes, or until a toothpick inserted into the center comes out clean.