01Separate the egg yolks from the egg whites into two separate bowls. 02Beat the egg yolks with the sugar and milk until smooth. 03Add the sifted flour and mix well. 04Beat the egg whites until stiff with an electric mixer. 05Gently fold the egg whites into the mixture, using bottom-up movements. 06Pour the batter into a 37×27 cm baking pan lined with parchment paper and smooth the surface. 07Bake in a preheated oven at 160°C for about 15 minutes, until lightly golden. 08Let it cool, then invert the base onto another sheet of parchment paper. 09Fill as desired, roll up, and refrigerate for 2 hours.
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