To discourage overbrowned cookie bottoms (which can happen when an oven heats unevenly), insulate the baking sheet by placing it inside a second baking sheet of the same size. The thin layer of air between the sheets will protect the top sheet from getting too hot. – “Tips Cooks Love” Andrews McMeel
Jay Campbell manages Sur La Table’s social media. He has an intense passion for all things fermented and fried chicken. As a diehard Mariners and Redskins fan, he dies hard often.