In a mixing bowl, combine 4 egg yolks, 1/3 cup granulated sugar, 1 cup milk, and 1 teaspoon vanilla extract. Whisk until the mixture is smooth and well combined.
In another bowl, sift together 1 1/4 cups all-purpose flour, 2 teaspoons baking powder, and 1/4 teaspoon salt. Gradually add this dry mixture to the wet batter, mixing until just combined. Avoid overmixing.
In a clean mixing bowl, beat 8 egg whites until soft peaks form. Gradually add in a pinch of sugar while continuing to whip until stiff peaks form. This step is crucial for achieving the soufflé-like texture.
Carefully fold the whipped egg whites into the batter using a spatula. It’s important to do this gently to keep the air in the egg whites, which will give your pancakes their fluffy structure.
Heat your non-stick skillet or griddle over low heat. Lightly grease it with a bit of oil or butter. Using a cookie cutter or ring mold, pour in the batter to form pancakes. Cover the skillet and cook for about 4-5 minutes, or until the bottoms are golden. Carefully flip the pancakes, cover again, and cook for another 4-5 minutes until cooked through.
Once cooked, gently remove the pancakes from the skillet. Serve warm with your favorite toppings such as whipped cream, fresh fruits, or a drizzle of syrup. Enjoy the fluffy texture and delicious flavor!