Cocoa Jelly Roll

• Scant ½ cup (1 ½ oz./40 g) cake flour
• ¼

Preheat the oven to 425°F (210°C). Sift the flour and cocoa powder together and set aside. Beat together the 3 whole eggs and 3 egg yolks with the granulated sugar until the mixture is pale and thick. Whisk the 3 egg whites together with the brown su