
Step 1
Preheat the oven to 200ºC, gas mark 6. Line a 24cm x 32cm Swiss roll tin with baking parchment. Place the eggs and sugar in a bowl, and whisk well with a hand-held electric whisk for at least 3 minutes until you have a very pale and thickened mixture that leaves a trail when the whisk is lifted out of the mixture. Carefully fold the flour, baking powder and vanilla extract into the egg mixture until well combined.