Line a mini muffin pan with 12 tin foil cupcake wrappers and set aside
Place chocolate and butter in a medium microwave safe bowl; melt by microwaving the chocolate and butter in 30-second increments and stirring in-between
Use a teaspoon to coat the bottom of each cup with melted chocolate; place muffin pan in fridge for fifteen minutes or until chocolate is set
Remove pan from fridge and spoon caramel sauce into center of each cup (about 1 tablespoon); if caramel sauce has been chilled and is firm, microwave for 10-20 seconds and stir for a more workable consistency
Spoon melted chocolate over caramel and around edges so that coated on all sides; sprinkle tops with flaky sea salt if desired (and it should be desired)
Chill for one hour in refrigerator before serving; store in refrigerator up to one week
Recipe by Keep It Sweet Desserts at http://www.keepitsweetdesserts.com/peanut-butter-caramel-candy-cups/