1 package family size brownie mix
8 ounces cream cheese
1/3 cup granulated sugar
1 egg
1/2 teaspoon vanilla extract

Prepare brownie mix as directed on package. Set batter aside.

Combine softened cream cheese and sugar; mix until well blended. Stir in egg and vanilla extract. Spread half of brownie batter onto bottom of greased 13 x 9-inch baking pan. Cover with cream cheese mixture; spoon on remaining brownie batter. Cut through batter with knife several times for marble effect. Bake at 350 degrees F for 35 to 40 minutes or until wooden pick inserted in center comes out clean. Cool; cut into squares.