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

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. Combine flour and salt. Add to mixture. Blend well. Spread batter in greased 9-inch square baking pan. Bake at 350 degrees for 45 to 50 minutes. Cool in pan on rack for 10 minutes.

TOPPING:

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

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.