3/4 c. butter (1 1/2 sticks)
2 foil-wrapped bars (4 oz.) Nestle unsweetened baking bars
1 3/4 c. sugar
3 eggs, well beaten
1 3/4 c. all-purpose flour
Cream Cheese Batter: Preheat oven to 350 degrees in a small bowl. Beat cream cheese and 1/2 cup sugar until smooth. Beat in 1 egg and vanilla. Set aside.
Chocolate Batter: In heavy gauge, medium saucepan over low heat. Melt butter and Nestle baking bar. Stir until smooth. Stir in 1 3/4 cups sugar. Blend in 3 eggs. Stir in flour. Spread chocolate batter into greased 13 x 9 inch pan. Spoon cream cheese batter over top. Swirl metal spatula through batter to marbelize.
Bake 30-35 minutes until edges begin to pull away from sides of pan. Cool completely cut into 2 inch bars.