Making French patisserie, window-worthy macarons may seem like an intimidating task. For many, these sweet tiny treats are a baking bucket list item that are only tackled by the bravest of bakers.

To prepare macarons, it is preferable that the egg whites are "aged," which means separated from the yolks a day before and stored in the fridge, in a bowl covered with cling film with slits, to let ...