1/2 c. butter
4 oz. unsweetened chocolate
2 c. sugar
1 1/2 tsp. vanilla
4 eggs
1 c. flour
1/2 c. chopped nuts (optional)

Melt butter and chocolate. Stir in sugar and vanilla. Add eggs, stir in flour, then nuts. Bake at 325 degrees for about 35 minutes or until dry on top. Yields 16 2 1/4-inch squares.