Reese's Peanut Butter Bars by Allrecipes.com

This is similar to a recipe I had many years ago and a favorite of my co-workers:

1 cup butter, softened
2 cups graham cracker crumbs
2 cups confectioner sugar
1 cup peanut butter

Mix above ingredients until well blended and press evenly into a ungreased 9" x 13" pan.

In a metal bowl over simmering water or in a glass bowl in the microwave the following items:

1 1/2 cups semisweet chocolate chips
4 tbsp. peanut butter

Melt this mixture, stirring occasionally, until melted and smooth. Spread over the prepared crust and chill for at least one hour before cutting into squares.