Separate the eggs carefully, keeping the yolks and whites in different bowls. Make sure the bowl for egg whites is completely clean because any grease or yolk can prevent the meringue from becoming fluffy.
Sift the cake flour and salt together before mixing. Preparing everything beforehand makes the cooking process smoother because the batter should be cooked soon after mixing.
Add lemon juice to the egg whites and begin whipping until small bubbles appear. Slowly add sugar in several additions while continuing to mix until stiff peaks form.
The meringue should look glossy and hold its shape when the whisk is lifted. This step creates the airy structure that makes souffle pancakes different from regular pancakes.
Once the meringue reaches stiff peaks, gently mix in the cornstarch. This helps strengthen the whipped egg whites and keeps the pancakes stable during cooking.
Add the egg yolks carefully and fold them into the mixture. Avoid overmixing because removing too much air will make the pancakes flatter.
Add the sifted cake flour and salt mixture into the egg mixture. Use a rubber spatula and fold gently until the flour is just combined.
Pour in the milk and continue folding slowly. The batter should remain thick, airy, and full of bubbles instead of becoming runny.
Heat a non-stick pan over low heat and lightly grease the surface. Place the batter into the pan to create tall pancake portions.
Add a small amount of water to the pan and cover it with a lid. The steam helps cook the pancakes evenly while keeping them moist and fluffy.
After a few minutes, add another layer of batter on top of each pancake. This creates extra height and gives the pancakes their signature thick appearance.
Cover the pan again and continue cooking slowly. Low heat is important because high heat can brown the outside before the inside is fully cooked.
Carefully flip each pancake using a spatula once the bottom becomes firm. Add a little more water if needed and cover the pan again.
Continue cooking until the pancakes feel soft but stable. They should have a light golden color and a fluffy center.
Remove the pancakes gently from the pan and serve while they are warm. Souffle pancakes are best enjoyed fresh because their airy texture is most noticeable right after cooking.