Janelle, our popover recipe gets its airy texture from the very enthusiastic whisking it requires. Some folks do add baking powder for extra fluffiness — feel free to give it a try! Piercing the tops shouldn't deflate the popovers at all, just allow the steam to escape. As a matter of fact, it might actually prevent sagging caused by excess moisture. We hope this helps with your popover experiments, because there's nothing like fresh, fluffy popovers right out of the oven! Kat@KAF

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