Christmas Peanut Butter Balls

2 sticks melted butter (1 cup)
1 c. chopped nuts
1 tsp. vanilla
1/2 c. peanut butter
1 box confectioners' sugar
1/2 box graham cracker crumbs
1/2 block paraffin wax

Mix first 6 ingredients in a bowl. Shape into 2-inch balls. Melt wax and chocolate or butterscotch chips in a double boiler. Dip the balls into the mixture and place on waxed paper to harden.