Unlawfully Rich Butterscotch Sauce - cooking recipe

Ingredients

1 cup light brown sugar (okay to use dark brown sugar)
1/4 lb butter (NOT margarine)
1/2 cup heavy cream (NOT milk)
1/4 teaspoon pure hazelnut extract (or your favorite flavor-optional, my addition)

Preparation

In a small, heavy saucepan combine all the ingredients except for the pure extract, if using.
Cook over medium heat, stirring constantly for about 5 minutes or until the brown sugar dissolves. Be careful that the sauce DOES NOT burn. If necessary, reduce heat to avoid burning.
Remove pan from heat, add the optional pure extract if using, and whisk well. Serve warm.