2/3 c. semi-sweet morsels
1 c. butter
2 1/2 c. sugar, divided
4 eggs, divided
2 tsp. vanilla, divided
1 1/4 c. flour
8 oz. cream cheese, softened

Melt chocolate and butter. Add 2 cups sugar. Stir. Beat in 3 eggs. Stir in 1 teaspoon vanilla and 1 1/4 cups flour. Spread in 9x13 pan which is greased well and floured. Set aside.

Beat cream cheese with 1/2 cup sugar, 1 egg and 1 teaspoon vanilla. Spread evenly over chocolate. Swirl with a knife to make a marbled effect. Bake at 350 degrees 35 to 40 minutes.