Creating Magic Cake is straightforward, and following these steps will ensure a delicious result:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a 9×9-inch baking dish.
2. Separate Eggs: Separate the egg whites from the yolks into two large mixing bowls.
3. Mix Yolks and Sugar: In the bowl with the egg yolks, add the granulated sugar. Whisk until the mixture becomes pale and creamy.
4. Add Melted Butter: Stir in the melted butter, mixing well.
5. Incorporate Milk and Vanilla: Gradually add the milk and vanilla extract, stirring until combined.
6. Add Zest: If desired, add the lemon zest for an extra burst of flavor.
7. Combine Dry Ingredients: In a separate bowl, whisk together the flour, salt, and baking powder.
8. Mix Dry with Wet: Gradually add the dry mixture to the wet mixture, stirring until smooth.
9. Beat Egg Whites: In the other bowl, beat the egg whites until stiff peaks form.
10. Fold in Egg Whites: Gently fold the beaten egg whites into the batter, being careful not to deflate the mixture.
11. Pour Batter: Pour the batter into the prepared baking dish, smoothing the top.
12. Bake: Place in the preheated oven and bake for 40-45 minutes or until the top is golden and a toothpick inserted in the center comes out clean.
13. Cool: Remove from the oven and let it cool in the dish for about 30 minutes.
14. Dust with Powdered Sugar: Once cooled, dust with powdered sugar before serving.

These steps will help you create the amazing Magic Cake that will wow everyone at the table!