Technical Stages :

• Clarify the eggs one by one.
• Whisk the egg yolks and sugar until pale and foamy.
• Sift the flour and cornstarch on top of the mixture.
• Whisk thoroughly.
• Beat the egg whites until stiff.
• Combine 1/4 of the whites, whisking vigorously to stretch the dough and combine the rest gently with a wooden spatula.
• Butter and flour a baking pan.
• Fill up the pan and put in the oven at 180°C or 356°F for 20 minutes.
• When baking is finished, check if it is so by dipping a knife into the cake. The blade should come out dry.
• Unmold immediately on a rack and leave to cool.