1/2 c. butter
1 1/2 c. graham cracker crumbs
1 (14 oz.) can sweetened condensed milk
1 (12 oz.) pkg. semi-sweet chocolate chips
1 c. peanut butter chips

Heat oven 350 degrees. In 9x13 inch pan melt butter in oven. Sprinkle crumbs evenly over melted butter. Pour milk over crumbs, cover entirely. Top with chocolate then peanut butter chips. Bake 25 to 30 minutes until lightly browned.

Melt 1/4 cup chocolate chips and 1/2 teaspoon shortening. Drizzle over bars (if want). I put in bottom corner of sandwich bag and poke holes in bottom corner; squeeze from top to drizzle.