Preheat the oven to 390° Fahrenheit/ 200° Celsius and the bottom of your springform with parchment paper (mine is 9 inches in diameter and a darker, heavier metal. Depending on the size of yours and the type of metal, yours may bake a bit faster or a bit slower). Leave the sides clean.
Separate the egg whites from the yolks, placing the whites in a large bowl and the yolks in a smaller bowl. Add a pinch of salt to the egg whites and beat until almost stiff.Add about ¾ of the sugar and continue beating until stiff.
5 eggs, 1 pinch salt, 100 g granulated sugar
Beat the egg yolks with the remaining sugar until creamy.
Mix together the flour, cornstarch and baking powder and sift over the egg yolk-sugar mixture. Add the egg whites to the same bowl, and fold it the mixture carefully until no more white streaks or dry spots remain.
80 grams all-purpose flour, 30 grams cornstarch, 2 grams baking powder
Pour the batter into your prepared springform, even out the top by spreading it out with a spatula, then tapping your springform a few times on top of your counter.
Bake for about 15 minutes or until golden yellow. Exact bake time will depend on the size of your springform and the metal it’s made from. It will be done cooking when the middle springs back if you gently press on it using a finger.
Remove the pan from the oven and set on a cooling rack. Cover with a clean kitchen towel. After 5 minutes, run a clean, straight-edge knife between the cake and the ring of your springform to release the cake and prevent cracks as it cools. Leave it in the springform with the ring attached and cover with the clean kitchen towel again to prevent the cake from drying out. Let cool completely before you proceed with making your filling, about 1 hour.