01 -
Measure all your ingredients down to the gram so they’re ready to go. Combine the salt and cake flour while sifting them together. Use a piece of paper towel to lightly coat the inside of your pan with oil, then get it warming on very low heat.
02 -
Mix lemon juice into the egg whites and whisk until you see bubbles forming. Add half the sugar, then whip until they start holding soft peaks. Toss in the rest of the sugar and continue until the peaks are stiff and the whisk’s tip leaves a straight point when it’s lifted.
03 -
Add cornstarch, stirring until smooth, then gently stir in egg yolks halfway. Mix the sifted flour and yolk mixture until you can’t see dry flour anymore. Stir in the milk just until everything’s blended, then quickly load the mixture into a piping bag.
04 -
Pipe half the batter into 4 thick piles on the pan, leaving space between. Splash in half a tablespoon of water, cover with a lid, then cook 3 minutes. Add the rest of the batter on top, sprinkle more drops of water, and cook with the lid on for 4 more minutes. When the bottoms feel dry, carefully flip them over, add another bit of water, and cook covered for 4 minutes more until the sides are firm and springy to the touch.