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

Preheat oven to 350 degrees. In 13x9 baking pan, melt butter in oven. Sprinkle crumbs evenly over butter. Pour milk evenly over crumbs. Top with chips. Press down firmly. Bake 25-30 minutes. Cool.

TIP: (Optional) Melt 1 cup chips with 1 1/2 teaspoons butter. Melt and drizzle over bars.