Salted Caramel and Chocolate Pretzel Cups

whole graham crackers, crushed7 tablespoons butter, melted¼ cup sugar

chocolate, melted (65% cacao)¾ cup whole milk1/3 cup salted caramel (recipe follows)2 ½ cups pretzel2 tablespoon fleur de sel

granulated sugar2 tablespoons water2 tablespoons unsalted butter6 tablespoons of heavy cream½ teaspoons of kosher salt