and 1 teaspoon vanilla. Beat in 1/2 cup all-purpose flour and 1 cup semisweet chocolate baking chips or chopped pieces. TOPPING: Mix 1 c regular or light (reduced-fat) sour cream, 2 teaspoons sugar, and 1 teaspoon vanilla. COMMENTS: Soft, creamy lumps of chocolate chip cookie dough, made without egg, are a tantalizing surprise in this smooth cheesecake. Its a dessert that indulges those addicted to nibbling cookies before they bake.