No-Bake Peanut Butter Squares

2 cups powdered sugar
1 cup butter, softened
1 cup peanut butter
1 tsp vanilla
2 3/4 cups graham cracker crumbs
1 cup chopped peanuts, optional
2 cups semisweet chocolate chips
1/4 cup peanut butter

Line square pan, 9x9x2 inches, with aluminum foil, leaving 1 inch of foil overhanging on opposite sides.

Mix powder sugar, butter, 1 cup of peanut butter and the vanilla in large bowl. Stir in cracker crumbs and peanuts (mixture will be stiff.) Press in pan.

Heat chocolate chips and 1/4 cup peanut butter over low heat, stirring frequently, until smooth. Spread over crumb mixture. Cover and refrigerate about 1 hour or until it almost set.

Remove from pan, using foil to lift. Fold back foil; cut into 36 squares. Refrigerate uncovered about 2 hours or until firm. Cover and refrigerate any remaining squares.