1 c. (2 sticks) butter
1 c. brown sugar, firmly packed
1 egg
1 tsp. vanilla extract
2 c. all-purpose flour
1 (12 oz.) pkg. semi-sweet chocolate pieces

Preheat oven to 350 degrees. Cream butter; gradually add sugar, beating until well blended. Beat in egg and vanilla. Gradually blend in flour. Spread evenly in well-buttered 15 1/2 x 10 1/2 x 1 inch jelly pan. Bake 15 to 18 minutes until lightly browned. Remove from oven; quickly sprinkle chocolate pieces over baked cookie base. Return to oven 2 to 3 minutes to soften chocolate. Remove from oven, immediately spread chocolate evenly over cookie base. Mark off into 1 1/2 inch squares and top each square with one of the following; chopped nuts, crushed peppermint candy, flaked or shredded coconut, green gumdrop cutouts, silver degrees, assorted sugar crystals and/or red cinnamon candies. Chill just until frosting is set. Cut into squares.