Prepare and bake brownie mix as directed on package for 8-inch square pan in well-greased
9-inch springform pan.
Mix cream cheese, sugar and vanilla with electric mixer on medium speed until well-blend-
ed. Blend in sour cream. Add eggs, mixing on low speed just until blended.
Pour over brownie crust. Bake at 325 degrees for 60-65 minutes or until center is almost set. If using a silver springform pan (bake at 300 degrees for 60-65 minutes if using dark non-stick springform pan). Run knife along rim of pan to loosen cake. Cool before removing rim of pan.