Recipes vary, but the key ingredient to this dessert is, not surprisingly, cheese. The most common cheeses in the modern version of cheesecake are cream cheese, cottage cheese, ricotta and Neufchatel. The New York version that's become so famous uses cream cheese along with eggs, cream, sugar and usually a graham cracker crust. While there are a seemingly unlimited number of variations on this classic, New York style cheesecake is served plain with no other ingredients or toppings. Other types of cheesecake are topped with or otherwise contain fruits, cookies, peanut butter and pretty much any other decadent ingredient you can think of.