Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish.
In a medium bowl, whisk together the flour, baking powder, and salt. Set aside.
150 g All purpose flour, 6 g Baking powder, 1/2 tsp Salt
In a separate bowl, beat the egg yolks and granulated sugar together until pale and fluffy, about 5 minutes.
180 g Powdered Sugar, 5 no Eggs yolks
Add the milk, vanilla extract, and melted butter to the egg mixture, and mix until combined.
50 ml Oil or butter, 120 ml Whole milk, 2 tsp Vanilla essence
Gradually fold the dry ingredients into the wet mixture until smooth.
In another bowl, beat the egg whites until stiff peaks form. Carefully fold the egg whites into the batter, being careful not to deflate them.
5 no Egg whites
Pour the batter into the prepared baking dish and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean. Let the cake cool in the pan.