Whisk the eggs and sugar – In a large mixing bowl, use a whisk or electric mixer to beat the eggs and granulated sugar for about 3-4 minutes. You want the mixture to become pale, thick, and slightly foamy. This helps incorporate air into the batter, which is key to achieving that airy texture.
Add flavorings – Stir in the vanilla extract and, if you like a burst of freshness, the lemon zest. These ingredients will enhance the cookies’ flavor profile and give them a subtle yet delightful aroma.
Sift and combine dry ingredients – In a separate bowl, whisk together the all-purpose flour, baking powder, and salt. Sifting the dry ingredients ensures there are no lumps, and it helps the batter rise evenly.
Mix the dry and wet ingredients – Gently fold the dry ingredients into the egg mixture using a spatula. Be careful not to overmix—just fold until the ingredients are combined. The batter should be slightly thick but smooth.
Add butter and cream – Gently fold in the melted butter and heavy cream. These ingredients will give the madeleines their moist, melt-in-your-mouth texture, so be sure they’re fully incorporated but not overworked.