Millionaire Bars with Shortbread Crust, Caramel Filling and Salted Chocolate Topping - No Fail Recipes

Ingredients

• 2½ cups all-purpose flour
• ½ cup granulated sugar
• ¾ teaspoon salt
• 16 tablespoons unsalted butter, melted
• 1 (14-ounce) can sweetened condensed milk
• 1 cup packed (7 ounces) brown sugar
• ½ cup heavy cream
• ½ cup corn syrup
• 8 tablespoons unsalted butter
• ½ teaspoon salt
• 16 ounces bittersweet chocolate (6 ounces chopped fine, 2 ounces grated)
• 1 teaspoon butter, unsalted
• ½ teaspoon fleur de sel or flake salt