1 package brownie mix
Water, oil and eggs as called for on brownie mix package
 

Peanut butter marble:
1/3 C. packed brown sugar
1/3 C. crunchy peanut butter
1 egg
Optional: 1/2 C. peanut butter chips
 

Peanut butter frosting:
1 C. vanilla ready-to-spread frosting
1/3 C. creamy or crunchy peanut butter
2 to 3 t. milk

Preheat oven to 350° F. Grease or coat with nonstick cooking spray bottom only of 13x9-inch baking pan. Follow box-mix instructions for making fudgelike or cakelike brownie batter. Stir in the optional peanut butter chips, if desired. Spread batter in pan. Stir together the brown sugar, peanut butter and egg. Drop by tablespoonfuls onto batter. Cut through batter several times for marbled effect.

Bake at 350° F. for 30 to 35 minutes or until a toothpick inserted 2 inches from side of pan comes out clean or almost clean. Cool completely. Frost with Peanut Butter Frosting.

For frosting: Stir peanut butter into a cupful of vanilla ready-to-spread frosting and enough milk to make it smooth and spreadable.

Yield: 32 brownies