Step 1

Heat oven to 350°F.

Step 2

Line 8-inch square pan with foil, with ends extending over sides. Microwave chocolate and butter in large microwaveable bowl on HIGH 2 min. or until butter is melted; stir until chocolate is completely melted and mixture is well blended.

Step 3

Stir in 1/2 cup sugar. Add 2 eggs and 1/2 tsp. vanilla; mix well. Blend in flour. Spread into prepared pan.

Step 4

Beat cream cheese and remaining sugar in medium bowl with mixer until blended. Add remaining egg and vanilla; mix well. Spoon over brownie batter in pan.

Step 5

Bake 35 to 40 min. or until toothpick inserted in center comes out with fudgy crumbs. (Do not overbake.) Cool completely. Use foil handles to lift brownie from pan before cutting to serve.