01 -
Preheat your oven to 350°F (175°C) and line a 15x10 inch jelly roll pan with parchment paper allowing some overhang for easy removal.
02 -
In a large mixing bowl, sift together the all purpose flour, granulated sugar, cocoa powder, baking powder, baking soda, and salt. Whisk until well combined.
03 -
In a separate bowl, beat together the egg, vegetable oil, vanilla extract, and buttermilk until smooth.
04 -
Gradually add the wet ingredients to the dry ingredients, mixing until just combined and the batter is smooth.
05 -
Pour the batter into the prepared jelly roll pan, spreading it evenly into the corners with a spatula.
06 -
Bake in the preheated oven for 12-15 minutes or until a toothpick inserted into the center comes out clean.
07 -
While the cake is baking, prepare a clean damp kitchen towel and sprinkle powdered sugar over it to prevent sticking.
08 -
Once the cake is done, remove it from the oven and let it cool for 5 minutes. Immediately invert the cake onto the prepared towel, removing the parchment paper.
09 -
Roll the cake up tightly with the towel starting from one short end, then leave it to cool completely while rolled up.
10 -
For the frosting, beat the heavy whipping cream in a medium bowl until soft peaks form. Gradually add the powdered sugar and vanilla extract, continuing to beat until stiff peaks form.
11 -
Once the cake has cooled, unroll it carefully. Spread an even layer of the whipped cream frosting over the cake, leaving a small border around the edges.
12 -
Roll the cake back up without the towel, just as you did before. Place seam side down on a serving platter.
13 -
In a small bowl, mix the cocoa powder and remaining powdered sugar together to create a dusting for the frosting, or apply additional whipped cream on top. Decorate the top with chocolate shavings or sprinkles as desired to resemble tree bark. Chill the Yule Log in the refrigerator for at least an hour before slicing to serve.