Rich Butterscotch Sauce - cooking recipe

Ingredients

3/4 cup dark brown sugar
1/2 cup dark corn syrup
6 tablespoons butter, cut into small cubes
1/4 cup sugar
1/4 teaspoon salt
1/2 cup whipping cream (unwhipped)
1 1/2 teaspoons vanilla

Preparation

In a heavy-bottomed saucepan combine first 5 ingredients; stir over low heat until both sugars dissolve.
Increase heat and boil until large bubbles break on surface, and sauce drops quickly from the spoon (this should take around 2 minutes).
Remove from heat; whisk in whipping cream and vanilla (mixture will bubble up vigorously).