Soft sponge cake

This fluffy lovely is done in 15 min. Here goes:

3 large eggs

200g optima flour 

50ml milk

1tsp vanilla essence

50g melted butter

Preheat oven to 170C (yes kids this is gonna be a quick one). In a mixing bowl, add everything except the butter. Mix at high speed for about 10 min. Then, fold in the cooled melted butter. But it all in a cake tray and bake for approx 20min. 

Varieties:

I marbled the cake by separating the mixture into 2 then adding 1tbsp chocolate emulco into one half before pouring in the batter in an alternating fashion. You can change chocolate to any berry purée. That's it!