Brownie Swirl Cheesecake

1 pkg (8 oz) brownie mix
3 pkg cream cheese, softened
3/4 c sugar
1 t vanilla extract
3 eggs
1 c milk choc chips, melted

Prepare brownie mix according to package directions for chewy fudge brownies. Spread in a greased 9 in springform pan. Bake at 350 for 20 mins (brownies will not be done) Cool for 10 mins on a wire rack. In a mixing bowl, combine cream cheese, sugar, and vanilla; mix well. Add eggs one at a time, beating well after eatch. Pour over brownie crust. Top with melted chocolate and swirl with a knife. Bake at 350 for 35-40 minutes, or until center is almost set. Run knife around edge of pan. Cool completely. Remove sides of pan, and refrigerate at least 3 hours.