French classic mini Madeleine cakes (or sponge cookies), the recipe is very simple and will not cause anyone difficulties. You just need to stick to the exact proportions, temperatures, and little nuances. They taste incredible - soft, airy with a hint of vanilla and lemon. Madeleines are very popular in France and Europe as a whole. They have a seashell shape - and that's the most important thing! On the reverse side, they have a characteristic bump (called a “sail”) and it must be there, it's what makes them authentic. If you want to make something simple and impressive - make Madeleines!