Best Salted Caramel Chocolate Chip Cookies

Ingredients

• 1 cup granulated sugar, for the caramel
• 1 cup unsalted butter, softened
• 1 cup brown sugar
• 1 cup granulated sugar
• 2 large eggs
• 1 egg yolk
• 2 tsp vanilla extract
• 1 tsp baking powder
• 1 tsp baking soda
• 1 tsp fine sea salt
• 3 cups + 2 tablespoons all-purpose flour
• 1 cup bitter-sweet chocolate chip
• ½ cup dark chocolate, finely chopped
• Flaky sea salt, for sprinkling