Nothing beats a beautiful and classic bake for the holidays, like these Chocolate Mocha Yule Log Cakes. This recipe makes two yule log cakes from one sheet of sponge; one to give, and one to keep.
This is my first yule log cake of the year, but I love the tradition so much I may post a second one this month. It’s my absolute favorite bake for Christmas, and for me, it’s right up there with making a gingerbread house. Silky-smooth crème au beurre au café (coffee-flavored French buttercream) fills a classic chocolate Swiss roll in these Chocolate Mocha Yule Log Cakes, and both cakes are wrapped in chocolate marzipan ‘bark’.
Swiss roll batter starts with well-whipped eggs. Beat them until they are pale, thick, and when the beater is lifted the batter forms a trail in the bowl. The mixture will deflate slightly when the other ingredients are added, but should still yield a thick yet pourable batter.
Bake the sponge in a 15×11-inch jelly roll pan (or similar size). When done, immediately turn it out and cut it in half so that you have two 7.5 x11 inch pieces. Then roll each half up into a sugar-dusted tea towel starting at a short end and cool completely.
Crème au beurre au café (French coffee buttercream).
While you’re waiting for the sponges to cool, whip up a batch of coffee-flavored whole egg French buttercream. It’s a lot like regular French buttercream, but instead of using egg yolks, you use whole eggs. Get out the ol’ candy thermometer for this one. It’s an extra step but worth it, I promise. Because it’s so silky-smooth and luxurious!
Unroll the sponge and let the most curved end stay curled. Pipe lines of buttercream onto the sponge, spread evenly and then roll it back up. Repeat this process with the second sponge.
Wrap both of the swiss rolls , in a double thickness of waxed paper and then with plastic wrap. The waxed paper helps the cake keep its round shape, and the plastic wrap prevents it from drying out. Refrigerate until firm.
While you wait for the cake to chill, knead some marzipan with unsweet cocoa powder. We’re going to make faux tree bark, and marzipan makes a tasty and beautiful covering.
Tree bark impressions.
First, you’ll need to acquire a tree bark silicone mold, which can be found . It’s inexpensive and easy to store because it’s flat. Apply some unsweet cocoa powder to the mold to ‘dust’ it before pressing the marzipan. Gently roll the marzipan onto the mold and then turn it out. Trim away the plain edges.
Drape the marzipan over the cake and and fit around the top and sides. It should adhere naturally. But if it seems too dry, brush the cake with a little water before applying the covering. Trim away any excess ‘bark’.
You just can’t go wrong with the flavors of chocolate and coffee together! The silky coffee buttercream is a lovely contrast to the sponge texture. The marzipan tastes mostly of chocolate instead of almond, as the addition of unsweet cocoa will overtake the delicate almond flavor. And that’s preferred for this deeply chocolaty confection!
I opted for a simple presentation without meringue mushrooms (but if you’d like to make some, !). Instead, I used some cute red axe cupcake picks, purchased from . Although they are currently out of stock, you can find some for purchase instead. I think they’re so funny and cute. And they’re perfect with this woodsy cake.
Chocolate Mocha Yule Log Cakes
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Equipment
- 15×11 inch jelly roll pan, or similar size
- Tree bark silicone impression mat
- Kitchen dedicated art brush
- Axe cupcake picks
Ingredients
Swiss roll
French coffee buttercream
Assembly
Instructions
Chocolate sponge
- Lay out two tea towels on a work surface. Sprinkle each tea towel with 1/4 cup powdered sugar and rub sugar into towel with your hands.
- In a separate bowl, sift together flour, cocoa, baking powder and salt. Slowly add to the liquid ingredients. Mix until well combined. Pour batter into prepared pan and smooth evenly with a rubber spatula. Bake 12-15 minutes. Cake is done when it springs back when pressed with fingers.
Make the French coffee buttercream
- In a small heavy saucepan set over medium heat, dissolve the sugar in the water. Bring the mixture to a boil, stirring constantly. Continue to cook until it registers 240°F on a candy thermometer.
- Transfer buttercream to a piping bag with 1/2-inch hole cut in the end of the bag.
Assembly
- Knead the marzipan and dark chocolate cocoa powder together until the marzipan is consistently dark brown in color. Dust the tree bark impression mat with cocoa powder using a small kitchen-dedicated art brush to get into all the nooks and crannies of the silicone mat.
- Roll out half of the marzipan on a lightly cocoa-powder dusted work surface. Place it on the impression mat and roll so that the marzipan takes on the tree bark impression; don’t roll too hard or the marzipan will tear.