Peanut Butter Cups

4 large graham crackers
1 Cup peanut butter
1/2lb powdered sugar
1/2 Cup butter
1 large chocolate bar

- Put graham crackers in a plastic bag or between sheets of wax paper; crush with a fork, a rolling pin, a blender or a hammer. Set aside. In a large saucepan, slowly melt butter over low heat. Remove from heat. Blend in crushed graham crackers, peanut butter, and powdered sugar until completely mixed. Press into an 8-inch square pan. In the top of a double boiler, melt a large chocolate bar; spread on peanut butter mixture. Let cook, and cut into bars.