Salted Caramel Chocolate Chip Cookie Bars

INGREDIENTS

• 2 1/8 cups all-purpose flour
• ½ teaspoon baking soda
• ½ teaspoon salt
• 12 tablespoons unsalted butter, melted and cooled to room temperature
• 1 cup light brown sugar
• ½ cup granulated sugar
• 1 egg
• 1 egg yolk
• 2 teaspoons vanilla extract
• 2 cups chocolate chips
• 10 ounces caramel candy squares, unwrapped
• 3 tablespoons heavy cream
• Fleur de sel (or other sea salt), for sprinkling over caramel and bars