Here is the recipe with slightly modification.
Ingredients of batter:
- 80 gm self rising flour
- 3 egg yolks
- 14 gm caster sugar
- 35 gm vegetable oil
- 45 gm milk
- 1/8 tsp salt
- 2 ripe bananas, about 240 gm
Ingredients of egg whites:
- 4 egg whites
- 40 gm caster sugar
Preheat oven to 160 C. Use a small food processor to process the bananas into paste. Set aside.
Mix the egg yolks with 14 grams of sugar until smooth. Add oil, milk and mashed bananas. Combine very well. Sift in flour, incorporate all ingredients well until you get a smooth batter.
Use an electric mixer to beat egg whites first for a while until bubbles form. Add one third of the 40 grams of sugar at a time. Combine well between the adds, until stiff peaks form.
Fold in the egg whites into the batter. Add one third of egg whites at a time in order to easily incorporate the egg whites
Transfer the batter into the cake mould that shouldn’t be non-stick or greased. (The mould you use is very important to get the best result. It helps the cake avoid from shrinking too much after removing from the oven, once the temperature drops.) Pop in the preheated oven and bake for 55 to 60 minutes. Test it by an inserted needle coming out clean. Remove from oven and immediately revert the cake mould upside down on a wire rack. Let it cool completely. Carefully remove from the cake mould. Enjoy!