01 -
Preheat the oven to 350°F. Line a 10x15-inch jelly roll pan with parchment paper and lightly grease the surface.
02 -
In a large bowl, beat the eggs and granulated sugar with a hand mixer on medium-high speed for 4 to 5 minutes until thick and pale.
03 -
Incorporate 1 teaspoon of vanilla extract into the egg mixture and stir until just combined.
04 -
In a separate bowl, whisk together the all-purpose flour, unsweetened cocoa powder, baking powder, and salt until evenly mixed.
05 -
Gently fold the dry mixture into the egg batter until smooth with no visible dry spots.
06 -
Evenly spread the batter in the prepared pan and bake for 12 to 15 minutes, or until the cake springs back when lightly touched.
07 -
Remove cake from oven. While still warm, invert onto a clean kitchen towel dusted generously with powdered sugar, peel off parchment paper, and roll the cake with the towel from the short end. Allow to cool completely.
08 -
In a chilled bowl, beat heavy whipping cream, powdered sugar, and 1/2 teaspoon vanilla extract until stiff peaks form.
09 -
Carefully unroll the cooled cake and spread the whipped cream evenly over the surface. Roll the cake tightly without the towel.
10 -
Place the roll seam-side down on a serving platter, dust the top with powdered sugar, slice, and serve.