In a 1 1/2- to 2-quart pan over medium-high heat, bring 3/4 cup whipping cream, 1 cup firmly packed brown sugar, 2 tablespoons butter, and 1/2 teaspoon vanilla to a boil. Cook, stirring often, until slightly thickened, about 3 minutes.
Sooooooooo good!!! Loved it drizzled on the toffee pudding recipe!