Peanut Butter Bars

For all you Albuquerque school kids who call these "gold bars":

1 1/2 c. Peanut Butter

1 1/2 c. crushed graham crackers

1 lb (4 c.) powdered sugar

1 c. butter, melted

Mix together and press into a 9 x 13 pan.  Melt 12 oz. chocolate chips and spread on top.  Refrigerate and cut into squares.