Delicious Brownie Bars

Filling:
6 ounces cream cheese, softened
1/2 cup sugar
1/4 cup butter, softened
2 tablespoons all-purpose flour
1 egg, lightly beaten
1/2 teaspoon vanilla extract

Brownie:
1/2 cup butter, cubed
1 square (1 ounce) unsweetened chocolate
2 eggs, lightly beaten
1 teaspoon vanilla extract
1 cup sugar
1 cup all-purpose flour
1 teaspoon baking powder
1 cup chopped walnuts

Topping:
1 cup (6 ounces) semisweet chocolate chips
1/4 cup chopped walnuts
2 cups miniature marshmallows

Frosting:
1/4 cup butter
1/4 cup milk
2 ounces cream cheese
1 square (1 ounce) unsweetened chocolate
3 cups confectioners' sugar
1 teaspoon vanilla extract

In small mixing bowl, combine the first six ingredients until smooth; set aside. In a large saucepan over medium heat, melt butter and chocolate. Remove from the heat and cool. Stir in the eggs, and vanilla. Add the sugar, flour, baking powder and nuts, stirring until blended.

Spread batter in a 13-in. x 9-in. baking pan coated with cooking spray. Spread filling over batter. For topping, in small bowl, combine chocolate chips and nuts; sprinkle over filling. Bake at 350° for 28 minutes or until almost set. Sprinkle with marshmallows; bake for 2 minutes longer.

For frosting, in a large saucepan, heat butter, milk, cream cheese and chocolate until melted; stirring until smooth. Remove from heat; stir in confectioners' sugar and vanilla. Immediately drizzle over marshmallows. Chill well; cut into bars. Makes 2-1/2 dozen.
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