1 (1 lb.) box powdered sugar
1 egg
1 cup melted butter
1 cup peanut butter
1 cup finely crushed graham crackers
1 (6 oz.) pkg. chocolate chips
2 (1 oz. each) sq. bittersweet chocolate (optional)

Mix first 5 ingredients. Pat into jelly roll pan (15.5 x 10.5 x 1-inch). Melt chocolate in double boiler. Pour on top. Place in refrigerator for about 30 minutes. Cut into squares (or bars) and return to refrigerator.

Also good frozen.