Add the sugar to a medium sized saucepan set over medium heat. Stir occasionally until the sugar begins to melt, then stir constantly until the sugar is completely melted and has turned to a deep amber color.
Add in the butter and whisk until the mixture is smooth.
Take the mixture off of the heat, and slowly whisk in the heavy cream until it is completely incorporated into the caramel, then whisk in the salt.
Iced Salted Caramel Macchiato
Optional, but for a more aesthetic drink you can use the back of a spoon to spread salted caramel sauce onto the inside of the cup.
Pour 2 tbsp. of the salted caramel sauce into your cup.
Add in your milk of choice, then add in ice, leaving room at the top for the espresso.
Brew the espresso, then slowly pour it over the milk. Serve and enjoy!