1/2 c. crunchy peanut butter
1/3 c. butter
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

Beat the peanut butter, butter and sugars until creamy. Add the eggs and vanilla. In a small bowl blend flour, baking powder and salt. Combine both mixtures and mix well. Spread batter in 9"x13" pan. Sprinkle 8 ounces of chocolate chips over surface. Bake for 5 minutes at 350 degrees. With a knife swirl the chocolate until top is covered. Bake for about 20 minutes more or until done at 350 degrees.