For a fluffier cake, add a spoonful of vinegar or lemon juice to the eggs while beating. You can also add 1 teaspoon baking powder to the flour
This is very customizable! For example, add vanilla extract to make it a vanilla cake. Add coconut shreds to the filling. Add food coloring to add color.
Soak the eggs in warm water for a few minutes to get them to room temperature faster.