1/2 c. crunchy style peanut butter
1/3 c. butter, softened
3/4 c. brown sugar
3/4 c. granulated sugar
2 eggs
2 tsp. vanilla
1 c. flour
1 tsp. baking powder
1/4 tsp. salt
12 oz. pkg. chocolate chips

Preheat oven to 350 degrees. In large bowl, place peanut butter, sugars and butter; beat until creamy. Gradually beat in eggs and vanilla.

In small bowl combine flour, baking powder and salt. Blend into peanut butter mixture. Spread into greased 9 x 13 inch pan. Sprinkle chocolate chips over batter. Place in oven for 5 minutes. Remove from oven. Run knife through to marbelize. Return to oven. Bake for 30 minutes. Cut into bars when partially cool.