Upside Down Orange Cake

Upside Down Orange Cake
Ingredients:
1 Cup All Purpose Flour
1 Cup Caster Sugar
1/3 Cup Milk
1/3 Cup Brown Sugar
1/4 Cup Melted Butter
1 Tbsp Baking Powder
1 tsp Vanilla Extract
1/2 tsp Orange Essence
2 Oranges
3 Eggs
Procedures:
Orange Toppings:
1.) Boil 1 cup water and add 1 cup caster sugar around 5-10 mins
2.) Add thin sliced orange and continue to boil for 2 minutes
3.) Arrange orange in a grease pan with baking paper then pour the water & sugar mixture
Orange Cake Batter:
1.) Cut the other orange into pieces then blend it with 1/3 cup milk
2.) Separate egg yolks and egg whites and mix the egg yolks with other ingredients gradually.
3.) Whisk the egg white until it turn into icing/foamy.
4.) Slowly mix the egg white to cake batter then pour it on the pan with orange toppings.
5.) Bake for 1 hour at 160 °C. Enjoy