This is the version of the Magic Cookie Bars I have made for 25 yrs

Double Delicious Cookie Bars

1/2 c. butter

1 1/2 cups graham cracker crumbs

1 ( 14 oz) can Sweetened Condensed Milk

1 (12oz) pkg of semi sweet chocolate chips

1 cup Peanut butter chips

Preheat oven to 350 and 325 for glass dish. In a 13×9 pan melt the butter in oven.  sprinkle crumbs evenly over butter, pour sweetened condensed milk evenly over the crumbs.  Top with chips and press down firmly.  Bake 25-30 min. until lightly browned.  Cool. Makes 24-36 bars. 

My son loved these growing up.  They are quite rich.