The Official Eatbook Page on Instagram: "After you learn how to make these cookies, you’ll never need to buy another cookie in your life ever again 🍪 🥣 Ingredients: - ½ cup brown butter (113g) - ¼ cup granulated sugar (50g) - ½ cup dark brown sugar (100g) - 1 large egg - 1 tsp vanilla extract (5g) - 1½ cups all-purpose flour (190g) - ½ tsp baking soda (3g) - ¼ tsp salt (1g) - Chocolate chips — use as much as you like (plus extra for topping and filling) - Marshmallows (jumbo size or cut in hal