1. Combine margarine and peanut butter.
2. Stir until creamy.
3. Mix in graham crackers.
4.
Stir in confectioners sugar.
5. Press firmly into a 9" x 13" buttered pan. (or line pan with tinfoil or waxed paper)
6.
Top with melted chocolate.
7. When totally cooled cut into 1 1/2" squares.