If despite your best efforts your pumpkin cheesecake cracks, my best suggestion is to simply cover up the crack. Some whipped cream or sugar-free caramel topping should do the trick. Sour Cream Topping is also a popular solution to this common issue. To Make: Mix together 1 pint sour cream, 1/4 cup measures like sugar zero carb sweetener and a teaspoon of vanilla extract. Spread over the cooled cheesecake.