1 stick butter
2 c. peanut butter
2 1/2 c. powdered sugar
1/2 c. brown sugar
1 c. fine graham cracker crumbs

TOPPING:

1 stick butter
1 (12 oz.) bag chocolate chips

Melt butter and peanut butter (microwave is easiest). Add powdered sugar, brown sugar and cracker crumbs. Stir until blended. Pour into 9x13 cake pan. Smooth top with back of spoon.