3 oz. unsweetened chocolate
1/2 c. butter
2 c. sugar
4 eggs
2 tsp. vanilla
1 c. flour
1/2 tsp. salt

TOPPING:

3 tbsp. butter
3 c. semi-sweet chocolate pieces (6 oz.)
2 c. miniature marshmallows
1/2 c. coarsely chopped walnuts

For brownies: Melt chocolate and butter in saucepan over very low heat, stirring constantly. Remove from heat. Stir in sugar. Beat in eggs, one at a time, beating well. Blend in vanilla. Add flour and salt. Mix well. Spread batter in greased 9 inch square baking pan. Bake at 350 degrees for about 50 minutes. Cool in pan on rack for 10 minutes.

Meanwhile, melt butter and chocolate in saucepan for topping. Sprinkle brownies evenly with marshmallows and walnuts. Return to oven. Bake for another 3 minutes. Drizzle with melted chocolate. Cool in pan. Cut into squares or rectangles.