3 c. graham cracker crumbs
2/3 c. butter
1 c. peanut butter
1 1/2 c. confectioners' sugar
1 can sweetened condensed milk
1 (12 oz.) pkg. chocolate chips

Mix together until crumbly: graham cracker crumbs, butter, peanut butter and confectioners' sugar. Pat mixture firmly into greased 9x13 pan.

Melt condensed milk and chocolate chips over low heat and pour over mixture. Cool in refrigerator for 30 minutes, then cut into squares.