Achieving truly crispy cookies starts with thorough creaming of the butter and sugars; this incorporates air and ensures a tender, yet crisp crumb. For an even more pronounced caramel note, consider using a higher ratio of dark brown sugar or adding a pinch of malt powder to the dry ingredients. Ensure your butter is at a perfect room temperature for optimal emulsification. Bake until the edges are deep golden brown and the centers are just set; slight underbaking will result in a chewier cookie, while overbaking leads to hardness. A sprinkle of flaky sea salt on top before baking beautifully contrasts the sweetness and enhances the chocolate flavor. For consistent size and even baking, use a cookie scoop.