Step 1: Preheat the oven to 180°C (350°F).
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Step 2: Prepare the biscuit by separating the eggs and beating the egg whites until stiff peaks form. Gradually add the granulated sugar and mix in the egg yolks. Gently fold in the sifted flour, spread the batter on a baking sheet, and bake for 10 minutes.
Step 3: Once baked, transfer the sponge cake to a damp cloth, roll it up, and let it cool.
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Step 4: For the cream, soften the gelatin in cold water. Whisk the egg yolks with the granulated sugar, then mix in the mascarpone. In a separate bowl, whip the heavy cream to form stiff peaks.
Step 5: Dissolve the gelatin in hot water and add it to 2 spoonfuls of whipped cream. Combine this mixture with the mascarpone cream, then gently fold in the remaining whipped cream.
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