In a bowl, whisk egg yolks, milk, vegetable oil, and vanilla extract until well combined.
In a separate bowl, whisk together sifted flour and baking powder; add to yolk mixture and whisk until smooth.
In another bowl, beat egg whites until foamy, gradually adding sugar, and continue to beat until stiff peaks form.
Gently fold the egg whites into the yolk mixture in thirds, being careful not to deflate.
Heat a non-stick skillet over low heat and lightly oil the surface. Pour batter into the skillet, cover with a lid, and cook for about 10 minutes or until bubbles form on the surface.
Carefully flip the pancakes, cover again, and cook for an additional 5-7 minutes until browned and cooked through.
Notes
Serve pancakes with your favorite toppings such as syrup, fruit, or whipped cream.