Fudge-Topped Brownies

1 Cup Butter
4 Squares (1oz each) Unsweetened chocolate
2 cups sugar
2 tsp vanilla extract
4 eggs
1 ½ cups all-purpose flour
1 tsp baking powder
½ tsp salt
1 cup chopped walnuts (optional)
TOPPING:
4 ½ cups sugar
1 can (12oz) evaporated milk
½ cup butter
1 pkg (12oz) semisweet chocolate chips
1 pkg (11 ½ oz) milk chocolate chips
1 jar (7oz) marshmallow crème
2 tsp vanilla extract
2 cups chopped walnuts (optional)

Follow the melting instructions on the package of the unsweetened backing chocolate squares. Melt Chocolate squares and butter, stir to combine. Blend in sugar and vanilla. Beat in eggs. Combine flour, baking powder and salt; add to chocolate mixture. Stir in nuts. Pour into a greased 13x9x2in baking pan. Bake at 350 degrees for 25-30 min. or until top springs back when lightly touched.
FUDGE:
In a larger saucepan, combine sugar, milk and butter. Bring to a boil over medium heat. Reduce heat; simmer 5 min. stirring constantly. Remove from heat. Stir in chips,crème and vanilla;beat until smooth. Add nuts. Spread over warm brownies. Cool in fridge until firm. Cut into 1-in squares. Yield: A LOT!!!
This recipe also works great cut in half. Just use an 8x8 or 9x9 pan