CRUST:

1 1/2 c. flour
1/2 tsp. baking powder
2/3 c. butter
2 eggs, slightly beaten
2/3 c. brown sugar
1/2 tsp. salt
1/4 tsp. baking soda
1 tsp. vanilla

FILLING:

1/4 c. butter
1 1/4 c. powdered sugar
2 1/4 c. creamy or chunky peanut butter

Mix crust ingredients together, pat in 9x13 inch pan. Add mixed filling ingredients, put over top of crust. Bake at 350 degrees for 12-15 minutes. Take out, add chocolate chips to bars. Put back in oven 2-3 minutes.