Sponge recipe:
6 tablespoons flour /
5 tablespoons sugar /
4 tablespoons milk /
3 tablespoons oil or soft butter /
2 eggs /
1/2 packet baking powder (8 grams - +|- 2 teaspoons)

*You may want to add some vanilla essence or flavor of your choice.
Mix everything together with a hand mixer and fill in prepared baking form.

Bake at 170°C (325°F) convection (or 180°C/ 350°F) for 15-20 mins.

Let cool and add topping of your choice.

~Bon Appétit~