*To age egg whites, place egg whites in a medium bowl. Cover with plastic wrap, and let stand at room temperature for 3 to 6 hours. Alternatively, egg whites may be collected over the course of a week or a month and kept in an airtight container in refrigerator. Let egg whites come to room temperature before using.
†For testing purposes, our test kitchen used four baking sheets and Silpat Non-Stick Baking Mats. Shells can be piped and baked in batches, if needed. For piping, our test kitchen recommends using a Wilton No. 10 or No. 12 Round Decorating Tip.
Note: Using Imperial measurements instead of grams may give a slightly different result due to differences in weight among different product brands.