Double Delicious Chocolate Chip Bars

cookies

1/2 cup margarine or butter
1 1/2 cup graham cracker crumbs
14 oz condensed milk
12 oz chocolate chips
6 oz peanut butter flavored chips

PREHEAT OVEN TO 350 DEG F. IN A 9 X 13 BAKING DISH, MELT MARGARINE IN THE OVEN. SPRINKLE WITH CRUMBS. POUR IN CONDENSED MILK EVENLY OVER CRUMBS. TOP WITH CHIPS. PRESS DOWN. BAKE FOR 25 TO 30 MINUTES. COOL. CUT INTO BARS.