Not just any milk will do. In order for all this to happen, you need to make sure that you use a cream with a minimum milkfat content of 30%. Heavy Cream, with a milkfat content of 36%, and Whipping Cream, with a milkfat content between 30-35%, can both be found at your local supermarket. Don’t bother with any other types of milk! Fat-free and low-fat whipped creams do not exist naturally.