Sponge Cake

Recipe:
4 large eggs
100g cake flour (type 8)
90g (100g) sugar (adjust depending on desired sweetness)
1/2 tsp cream of tartar (or 1 tsp lemon juice)
25g vegetable oil
1/3 tsp salt
1/2 tsp vanilla extract
Cake mold: diameter = 16cm
Bake using a water bath.
Baking temperature and time vary depending on the power and heat intensity of each oven:
- Large oven (80L): Bake at 130°C for 40 minutes.
- Small ovens (45L-35L): Bake at 150-155°C for 45-50 minutes.