Chocolate Peanut Butter Squares

1 1/2 cups margarine, melted
2 cups peanut butter
4 1/2 cups confectioners' sugar
2 cups graham cracker crumbs
1/2 cup margarine
2 cups semisweet chocolate chips


Grease a 10x15 inch pan.
In a large bowl, combine 1 1/2 cups melted margarine, peanut butter, confectioners' sugar and graham cracker crumbs.
Spread in prepared pan.

Combine 1/2 cup margarine and chocolate chips in a medium bowl.
Microwave for 30 secs, stir and repeat until chocolate is melted.
Spread over peanut butter mixture.
Let cool completely before cutting into bars.