01 -
Preheat to 375ºF. Grease 15x10x1-inch baking sheet, line with parchment, grease again.
02 -
Whisk together cocoa powder, flour, and baking powder.
03 -
Whip egg whites with cream of tartar and salt, gradually add 1/4 cup sugar until medium peaks form.
04 -
Mix yolks with remaining sugar and vanilla until pale and thick.
05 -
Fold yolk mixture into whites, then fold in flour mixture in 2 batches.
06 -
Spread in pan, bake 12-14 minutes until springy.
07 -
Invert onto powdered sugar-dusted towel, remove parchment, roll in towel to cool.
08 -
Whip cream with sugar and vanilla until stiff.
09 -
Pour hot cream over chocolate, let sit 5 minutes, whisk until smooth.
10 -
Unroll cake, spread with whipped cream, re-roll. Cut branch piece, position on side.
11 -
Cover with ganache, create bark texture with fork, add sugared garnishes.