Try this classic sauce on our Fudgy Brownie Sundaes.
Cook sugar, salt and 1/4 cup water in a small saucepan over medium heat until sugar is a medium amber color, about 7 minutes; wash down sides of pan with a pastry brush dipped in water to prevent crystals from forming. Remove from heat. Stir in heavy cream; add butter, and stir until combined. Let cool to room temperature; stir in vanilla. Sauce can be stored in an airtight container in refrigerator up to 2 weeks. Reheat gently; serve at room temperature.