1 (20 ounce) package fudge brownie mix (13×9 size)
1/4 cup water (or what mix calls for)
1/3 cup oil (or what your mix calls for)
2 eggs (or what your mix calls for)
1 (8 ounce) package cream cheese
1/3 cup sugar
1/2 teaspoon vanilla
1 Preheat oven to 350 F degrees.
2 Prepare the brownie mix according to package directions (water, oil, eggs).
3 Pour into a greased 13×9-inch baking pan.
4 Beat cream cheese with electric mixer on medium speed until smooth.
5 Add sugar and mix. Add vanilla and egg; mix until well-blended.
6 Place cheese mixture in dolups over the whole pan, leaving some brownie showing inbetween.
7 Cut or swirl through batter several times with a knife or fork for a marbled effect. It can be tricky to get a good marble effect so be careful not to over work it.
8 Bake for 35 to 40 minutes. Cool; cut into squares. (These will also freeze well).
Source : allrecipes.Com