Ingredients

FILLING:6 ounces cream cheese, softened1/2 cup sugar1/4 cup butter, softened2 tablespoons all-purpose flour1 large egg, lightly beaten1/2 teaspoon vanilla extractBROWNIE:1/2 cup butter, cubed1 ounce unsweetened chocolate2 large eggs, room temperature, lightly beaten1 teaspoon vanilla extract1 cup sugar1 cup all-purpose flour1 teaspoon baking powder1 cup chopped walnutsTOPPING:1 cup semisweet chocolate chips1/4 cup chopped walnuts2 cups miniature marshmallowsFROSTING:1/4 cup butter1/4 cup 2% milk2 ounces cream cheese1 ounce unsweetened chocolate3 cups confectioners’ sugar1 teaspoon vanilla extract

Preparation

Preheat oven to 350°. In a small bowl, combine the first 6 ingredients until smooth.

In a large saucepan over medium heat, melt butter and chocolate. Remove from the heat and let cool. Stir in eggs and vanilla. Add sugar, flour, baking powder and nuts, stirring until blended.

Spread batter in a 13x9-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 until almost set, about 28 minutes. Sprinkle with marshmallows; bake 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.