First step is to make the salted caramel sauce. Skip these steps if using store bought sauce. For more detailed information and tips on homemade salted caramel sauce, please refer to my post on salted caramel sauce. To a pan with long sides (this is important), add 1/4 cup water and 3/4 cup sugar (150 grams). Set heat to medium-high. As the mixture simmers, the sugar will dissolve. Take a pastry brush, dip it in water and keep brushing the sides as the mixture bubbles. This will help prevent crystallization.