Fluffy Japanese Pancakes

In a mixing dish add two egg yolks, one tablespoon milk, and one half teaspoon vanilla essence.
Whisk until mixture thickens.
Into the basin sift baking powder and cake flour.
Whisk the ingredients until well blended.
Sort aside.
Add one fourth teaspoon cream of tartar and three egg whites.
Whisk steadily until it becomes light white.
Add the grained sugar gradually while still whirling the mixture.
Whisk until stiff peaks form.
Add gradually to the egg yolk mixture from past.
Turn some of the egg white mixture to the egg yolk mixture.
Mix gently until completely blended.
Slide mixture into a piping bag.
Over low heat, preheat pan for two to three minutes.
grease using vegetable oil.