Set your oven to 350°F (175°C). Grease and line a 12x17-inch baking pan with parchment paper. making sure the sides are well greased too.
In a large bowl, whisk together the flour, baking powder, salt, and cocoa powder.
1 cup All Purpose Flour, ¼ cup Dutch-Processed Cocoa powder, ¾ teaspoon Baking powder, ½ teaspoon Kosher Salt
In a stand mixer fitted with the whisk attachment, or in a large bowl with a handheld mixer, beat the egg whites on medium-high speed until foamy. Slowly pour in ¼ cup of sugar. Beat until you have stiff peaks.
5 large Eggs, ¾ cup Granulated Sugar
Transfer to a separate medium bowl and set aside.
Using the same mixer bowl (no need to wash it!), beat the remaining ½ cup sugar, egg yolks, vanilla, and oil together until the mixture is thick and pale on medium-high speed. We want this to get to the 'ribbon stage'. Stop the mixer and use a rubber spatula to lift up some of the batter, creating a figure-8 shape with the falling batter. If the batter sinks immediately, you need to continue mixing. If the figure-8 stays for a few seconds, then it's ready!
5 large Eggs, ¾ cup Granulated Sugar, 4 tablespoons Neutral Oil, 1 teaspoon Vanilla Extract
Add half of the egg whites to the yolk mixture with a rubber spatula, gently folding until just combined. Repeat with the second half of the egg whites.
Fold in half of the dry ingredients until just incorporated, then repeat once more. We don't want to knock too much air out of the cake batter.
Spread the batter evenly into your prepared pan using an offset spatula. Gently tap the pan on your counter to remove air bubbles.
Bake for 12–14 minutes, until the cake springs back lightly when touched.
While baking, place a clean thin tea towel on the counter and dust it with cocoa powder. This will help the cake not stick to the tea towel. You can use parchment paper, but I've found that a kitchen towel works better!
Cocoa Powder
Once baked, carefully flip the hot cake onto the tea towel. Gently peel off the parchment paper (which is now on top).
Starting from one of the short ends, gently roll the cake up with the towel inside. Roll slowly to avoid cracking the cake. You want to make sure the beginning of the roll is very tight so you get that nice roll effect when you slice into it.
Let the rolled cake cool completely, seam side down. Feel free to place in the fridge to speed up this process. You can do this 1 day ahead of time!
If you want to decorate with meringue mushrooms, I recommend making them while the cake cools.
Whipped Cream Filling
Make your filling. In the bowl of a stand mixer fitted with the whisk attachment, or in a large bowl with a handheld mixer, beat the heavy cream with the sugar and vanilla until you have medium peaks.
1 ½ cups heavy cream, 2 tablespoons granulated sugar, 1 ½ teaspoons vanilla extract
Once cooled, slowly unroll the cake. Gently spread over the vanilla whipped cream and dot the cherries all over. Gently roll the cake back up, this time leaving out the kitchen towel. Feel free to add more cherries if you want!
24 cherries in syrup or kirsch
Wrap tightly in plastic wrap and refrigerate for at least 1 hour, or up to 2 days.
Chocolate Ganache
When ready to decorate, make your chocolate ganache. Chop up your chocolate and place it in a large bowl.
6 oz Semisweet Chocolate
Heat the heavy cream in a saucepan over medium-low heat or in the microwave until it is simmering. Make sure it does not boil!
¾ cup Heavy Cream
Pour the hot cream over the chopped chocolate and let sit for 5 minutes.
Stir the chocolate and cream mixture with a rubber spatula until completely smooth, then stir in the salt.
pinch Kosher Salt
Let it sit at room temperature until thickened.
Assemble & Decorate
Use a small offset spatula or spoon to cover your chilled and rolled yule log with the ganache. I like to use a fork to create lines that resemble bark! Decorate with meringue mushrooms, a dusting of confectioners' sugar, and some rosemary. Enjoy!
Video
Notes
My recipes have been developed and tested in metric grams. I highly recommend using a weighing scale and measuring out your ingredients the metric way. I have provided a conversion to US cups but please note that I haven't tested the recipe with this method. Ingredients: I make sure that all of my ingredients are at room temperature before I start the recipe, so pull out all of the ingredients before you start baking.Salt: If you don't have kosher salt, halve the amount of salt called for in the recipe. 1 teaspoon kosher salt = ½ teaspoon fine salt. Please note, I'm using Diamond Crystal kosher salt and not Morton salt which is too salty! Cocoa Powder: I'm using dutch processed cocoa powder (not sure what you have? Check the ingredients. If it says 'acidity regulator' or mentions 'alkali', then it's dutch processed). Cherries: I'm using cherries that are in a kirsch syrup, but you can use dark cherries in just syrup and not alcohol if you prefer! I counted out 24 cherries that I used, but you can use more if you like. Meringue Mushrooms: You can find my meringue mushroom recipe here. Make Ahead: If you scroll up, I have a section on which parts you can make ahead and how far ahead of time you can make them.