The sponge gets its special lightness by adding baking powder. The taste of this cake is similar to a supermarket cakes (but better 🙂 ). This is a very good cake, especially if the fine form of cake is more important for you than its taste (the best taste you can find in the “Perfect sponge”, the recipe is here: https://tastydeliciousblog.wordpress.com/2017/01/17/guaranteed-ideal-bisciut-sponge-cake-easy-and-fast/ )
90-100 grams (1/3 cup+2 tbsp) sugar
90 g of all-purpose flour (3/4 cup) +1 tbsp of corn starch
½ tsp baking powder
1 tsp vanilla extract or vanilla sugar.
Mix eggs with sugar, turn your mixer at full capacity and beat for 5-10 minutes, until the mixture will turn white and will increase its volume in 3 times. Reduce the capacity of the mixer, add vanilla and pour flour, sifted together with baking powder, gradually until disappearance of lumps.
Preheat oven to 340F (170C). Grease a baking form with any oil and sprinkle with a flour. Non-stick forms don’t need greasing, but it is better to put a circle of baking parchment on the bottom. Pour the batter into the form.
Bake at 340F (170C) for 20 minutes, then another 30 minutes at 300F(150C). The main point at this time is not open the oven or the cake will fade. Check readiness with a toothpick (must be dry) in the center of the cake.