1½ cups graham cracker crumbs
1 lb powdered sugar
1½ cups peanut butter
2 sticks butter (melted)
12 oz milk chocolate chips
Combine graham cracker crumbs, sugar and peanut butter and mix well. Blend in melted butter until well combined. Press mixture evenly into a 9x13" pan.
Melt chocolate chips in a double boiler. Spread melted chocolate over mixture in pan.
Chill until just set and cut into bars while still soft.