According to NutriSoft, a slice of Cheesecake Factory's original cheesecake contains 710 calories and 29 grams of saturated fat. Other flavors of cheesecake, such as the Godiva chocolate cheesecake, contain more than 1000 calories per slice.
Wikipedia mentions that cheesecakes are generally composed of a thick layer of cream cheese, eggs and sugar mixture and a crust of crushed graham crackers, cookies or sponge cake and melted butter. Toppings vary and may include whipped cream, fruits, nuts, chocolate or fruit syrup. All of these ingredients are responsible for the rich and delicious taste of cheesecake as well as the high amount of calories and saturated fat.