Caramel Sauce

1 1/2 cups white sugar
1/3 cup water, boling
2 tablespoons unsalted butter
1 1/4 cups heavy cream
1/2 teaspoon vanilla extract
1 pinch salt

Put sugar in a heavy sauce pan over medium heat. Cook, stirring often, until all of the sugar melts and becomes a caramel color. Add water (will sizzle/boil up), followed by butter and cream. Continue heating over medium heat, stirring occasionally, until smooth. Add vanilla and salt. Allow to cool at least 30 min before serving.