Peggy's Peanut Butter Balls

What more can you say but........peanut butter and chocolate!!!

2 cups peanut butter

2 cups powdered sugar

2 cups graham cracker crumbs

1 stick margarine, softened

Chocolate for dipping

Combine all together and form into balls and chill. Melt chocolate over double boiler or microwave. Dip ball into chocolate and place onto wax paper to cool. Top with a nut while still warm, if desired.