Preheat the Oven: Heat the oven to 425°F (220°C). Lightly grease the Swiss roll pan 9 x 13in (23 x 33cm), then line it with parchment paper, and lightly grease the parchment.
Whip Up the Mixture: Place the eggs and sugar in a large bowl. Use an electric mixer at high speed to whisk them together until the mixture becomes pale and thick enough to leave a trail when the beaters are lifted out.
Incorporate the Flour: Sift the flour into the egg mixture and gently but thoroughly fold it in.
Spread the Batter: Transfer the mixture into the prepared pan and carefully tilt the pan to evenly spread the batter, ensuring it reaches the corners.
Bake to Golden Perfection: Bake for around 10 minutes or until the cake turns golden and begins to pull away from the sides of the pan.
Prepare for Rolling: Invert the cake onto generously sugared parchment paper. Peel off the lining paper and trim the cake edges using a sharp knife.
Roll and Rest: Roll up the cake along with the parchment paper from one of the shorter ends. Allow it to stand for 2–3 minutes.
Jam It Up: Unroll the cake and discard the parchment paper. Warm the jam slightly and spread it over the cake. Roll it up again.
Chill and Serve: Wrap the rolled cake tightly in parchment paper and let it cool. Unwrap, dust with confectioners’ sugar, and slice into delectable portions.