Reese's Peanut Butter Bars

2 cubes margarine
1 1/2 cups peanut butter
4 cups powdered sugar
1 1/2 cups semi-sweet chocolate chips


In a large, microwave-safe bowl, melt margarine. Remove from microwave and add peanut butter and powdered sugar. With an electric mixer, mix until combined. Grease a 9x13 pan and spread peanut butter mixture into bottom of pan evenly.
Melt chocolate chips in a microwave, stirring every 30 seconds until melted. Pour over peanut butter mixture and refrigerate for at least 1 hour prior to serving.