“Even though they have long shelf lives, chemical leaveners will lose potency over time. If the only box of baking soda you have around is the one that's been absorbing odors in your fridge for the last few years, it's probably a good idea to get a new box just for baking.”

American food writer and chef

Claire Saffitz is an American food writer, chef, and YouTube personality. She became widely known through her work at Bon Appétit, where she was a contributing editor until mid-2020 and appeared in several video series, including Gourmet Makes. In Gourmet Makes, she reverse-engineered popular snack foods into more elaborate versions, which helped make her a familiar face online. After leaving Bon Appétit, she published Dessert Person and What’s for Dessert, both New York Times best sellers, and has continued as a video host on her own YouTube channel and as a freelance recipe developer, including for New York Times Cooking.