Recipe taken from Cook's Illustrated. Have not tried, but look delicious. "The most efficient way to bake these cookies is to portion and bake half of the dough. While the first batch is in the oven, the remaining dough can be prepared for baking. Avoid using a nonstick skillet to brown the butter. The dark color of the nonstick coating makes it difficult to gauge when the butter is sufficiently browned. Use fresh brown sugar, as older (read: harder and drier) brown sugar will make the cookies too dry."