Basic yellow spongy cake recipe

I have made a cake for Sunday for a sister's birthday. Her husband told me about her birthday so I decided to give her a surprise :)

This is a good recipe for yellow cake because the cake is equally spongy everywhere, even in the middle of the cake!

I used 6" diameter X 3" deep pan

Ingredients:
4 eggs
40g butter
125g powder sugar (fine, not icing)/ normal sugar
125g flour
salt

Instructions:
1. In a small bowl, melt butter, keep it warm

2. Fill in some water in a pot, put it on the stove, heat it with medium fire.
In another big mixing bowl, add 4 eggs, sugar & a pinch of salt. Put the bowl on the pot. Use an electric mixer to mix the ingredients





The technique called "Bain-marie", click here to get the explanation, or see the pic at the left to get clear picture











3. When the water becomes hot, and while you are mixing the ingredients, the mixture becomes mousse and the color becomes lighter.
When the volume rises double/ triple, you can turn off the fire. Put it aside to cool down a bit

4. Add the melted butter and then flour onto the egg mixture little by little, incorporate delicately with a spatula - Cut the mixture fast and fold it from the bottom

5. Pre-heat the oven at 150°c. Grease the pan or line baking sheet on the bottom & side
Pour the mixture on the pan and put in the oven, bake for 30mins or until it is golden color
Note: If you use 3" deep pan, the baking time is 35mins