Chocolate Fudge Cheesecake Chocolate Crust 1 1/2 c (about 22 cookies) cream-filled chocolate cookie crumbs (such as Oreos), including the filling 3 T butter Cheesecake: 4 (8-oz) pkg cream cheese 1 1/2 c granulated sugar 5 eggs 1/4 c flour 1/2 t salt 1/4 c whipping cream 1 T vanilla 3 (1-oz) squares semisweet chocolate 1/2 c semisweet chocolate chips Chocolate Sour Cream Topping 3 T powdered sugar 2 t unsweetened cocoa powder 1 c sour cream 1 t vanilla