Grease bottom of 9-inch Springform pan. Prepare basic brownie mix as
directed on package; pour batter evenly into springform pan. Bake at 350
degrees F., 15 minutes. Combine cream cheese, sugar and vanilla, mixing at
medium speed on electric mixer until well blended. Add eggs, one at a time,
mixing well after each addition. Pour over brownie layer. Spoon chocolate
over cream cheese mixture, cut through cheese and chocolate mixture several
time to acheive a marble effect. Bake at 350 degrees F., 35 minutes. Loosen
cake from rim of pan; cool before removing rim of pan. Chill. Garnish with
whipped cream, if desired.

Serves 10