01 -
Preheat oven to 175°C. Line a 25x38 cm jelly roll pan with parchment paper. In a clean bowl, beat egg whites until soft peaks form, gradually adding 50 g sugar until stiff. In a separate bowl, combine egg yolks and remaining 50 g sugar; beat until pale and thick. Stir in vanilla extract. Sift flour, cocoa powder, baking powder, and salt together, then gently fold into the yolk mixture. Carefully fold in the beaten egg whites to maintain volume. Spread batter evenly into the prepared pan and bake for 10–12 minutes, until it springs back when lightly pressed.
02 -
Immediately turn the cake onto a clean kitchen towel liberally dusted with powdered sugar. Starting from the short end, gently roll the warm cake inside the towel and allow it to cool completely.
03 -
In a chilled bowl, whip heavy cream with powdered sugar and vanilla extract until stiff peaks form.
04 -
Carefully unroll the cooled sponge. Evenly spread the whipped cream over the surface, then gently roll the cake up from the short end. Wrap tightly in plastic wrap and refrigerate for at least 1 hour to set.
05 -
In a bowl, beat softened butter with powdered sugar, cocoa powder, milk or cream, and vanilla extract until smooth and fluffy.
06 -
Remove the cake from the refrigerator and place onto a serving platter. Cover the roll with the chocolate buttercream, then run a fork or spatula along the surface to create a bark-like effect. Decorate with fresh cranberries, edible mushrooms, edible glitter or snow, and rosemary sprigs as desired.
07 -
Finish by dusting with powdered sugar to mimic fresh snow before serving.