Anna Olson's New Favourite Chocolate Chip Cookie Recipe

Ingredients

• ¾ cup unsalted butter
• 1 cup packed light brown sugar
• ¼ cup granulated sugar
• 2 Tbsp caramel sauce or dulce de leche
• 1 large egg, at room temperature
• 1 tsp vanilla extract
• 1 ½ cups all-purpose flour
• ¼ cup regular rolled oats
• 1 Tbsp cornstarch
• ½ tsp baking soda
• ½ tsp flaked sea salt, plus extra for sprinkling
• 1 cup semisweet chocolate chips
• ½ cup salted caramel chips (see notes)