Salted Caramel Frosting

• 2 cups packed dark brown sugar
• 12 tablespoons (1½ sticks) unsalted but

In a heavy saucepan, combine the brown sugar, 8 tablespoons (1 stick) of the butter, and the salt and cook over medium heat, stirring constantly, until the mixture comes to a gentle boil, 5 to 8 minutes.