1/2 c. butter
1 1/2 c. graham cracker crumbs
1 (14 oz.) Eagle Brand sweetened condensed milk (not evaporated)
1 (12 oz.) semi-sweet chocolate chips
1 c. peanut butter chips

Preheat oven to 350 degrees (325 degrees for glass dish). In 9x13 inch baking pan, melt butter in oven. Sprinkle graham cracker crumbs evenly over butter; pour sweetened condensed milk evenly over the crumbs. Top with chips. Press down firmly. Bake 25-30 minutes. Cool. Cut into bars. Store loosely covered at room temperature.