In a medium saucepan, heat the sugar over medium heat.
Stir constantly until the sugar melts completely and turns a deep amber color.
Carefully add the butter pieces to the melted sugar, stirring until melted.
Remove the pan from heat and slowly pour in the heavy cream, stirring continuously.
Stir in the sea salt and vanilla extract until fully combined.
Allow the sauce to cool slightly before transferring to a jar.
Store any leftovers in the refrigerator.
Reheat in the microwave or on the stove before serving.
Enjoy your homemade salted caramel sauce!