Homemade Butterscotch Sauce

Melt the butter in a medium-sized saucepan over medium heat.

Add the sugar, cream, and salt, and whisk until well blended.

Bring to a boil then reduce the heat slightly and gently boil for 5 minutes.

Remove from the heat and whisk in the vanilla extract.

Serve warm or at room temperature (the sauce will thicken as it cools).

Store in an airtight container in the refrigerator and re-warm before using.