soft Sponge cakes in paper

I'm in baking mood today and i've decided for this sponge cakes in paper. All the ingredient can be found at home.This bake need a little preparation-to cut 9 greaseproof paper out from a 7 inches bowl. Insert the circles into sturdy paper/muffin cups
Ingredients
3 eggs
120g caster sugar (i find a little sweet, will reduce to 100g)
100g plain flour (sifted)
1tsp vanilla essence
2 tbsp canola oil

Method

1. Beat eggs in a mixer at low speed till frothy.
2. Add sugar gradually and beat at Med speed for a full 4mins till pale yellow and triple its volume
3. Switch mixer to low speed and add in vanilla essence. Add flour to the egg mixture quickly. Beat for a few second and switch off mixer as soon the ingredients are combined. Do not overbeat
4. Scoop out some mixture (approximate 2 cups) into a bowl and add cooking oil to it. fold the mixture till the oil is well incorporated into the mixture.
5. Pour the oil mixture back into the egg mixture and fold lightly till all are combined. Do not overmix
6. Transfer mixture to a jar with a spout. Pour mixture into paper lined cup till about 85% full
7. Bake at 180c for 20mins