Prepare all the ingredients.
Whisk the eggs and sugar in a metal bowl...
...over a bain Marie.
The temperature of the mix should reach about 40°C (104°F).
Keep whisking until fully cooled. You can use either a regular whisk or a hand mixer.
Combine gently the flour...
...using a wooden spatula or a skimmer and stirring in a circular pattern.
Pour in a buttered and floured baking pan or on a buttered baking sheet.
Bake in warm oven (180°C or 356°F)...
...until golden.
Unmold. Leave to cool on a rack.