Over med heat Melt butter

Add brown sugar and salt stir with wooden spoon(no metal)

Bring to low boil. Stir for 3-4 minutes

Remove from heat, stir in vanilla and liquor

If you would like Smoked Butterscotch. before step 1, spread brown sugar and salt out on baking parchment. Smoke for 1 hour at 150-165 degrees(as low as possible). Make sure wood matches the alcohol you plan to use. I like pecan or oak with my whiskey and rye, Maple or cherry with Grand Marnier, cherry or apple with brandy.