French Yule Log Cake with Chocolate Buttercream
A showstopping traditional French buche de Noel featuring a delicate sponge cake rolled with silky chocolate buttercream, topped with whimsical marzipan mushrooms and cocoa dust. The cake is assembled to resemble a log with bark-like texture. Serve this elegant dessert at winter celebrations or holiday gatherings. This version balances the rustic woodland aesthetic with refined French pastry technique, requiring multiple components and careful assembly.
Ingredients
- 4 eggaquafaba 3 tbsp per egg yolk; use applesauce + baking soda for whitesvariesdietary
structure may differ; mousse-style
Full guide → - ⅝ cups superfine sugar
- 1 cups all-purpose flourgluten-free 1-1 blend1:1dietarygluten-free
ensure xanthan gum included
- 1 teaspoon sea salt
- 4 tbsp salted butter
- 1 tablespoon butter
- 1 cup superfine sugar
- 4 tbsp water
- 1 tablespoon vanilla extract
- 3 eggaquafaba 3 tbsp per egg yolk; use applesauce + baking soda for whitesvariesdietary
structure may differ; mousse-style
Full guide → - 2 egg yolkaquafaba 3 tbsp per egg yolk; use applesauce + baking soda for whitesvariesdietary
structure may differ; mousse-style
Full guide → - 21 tbsp salted butter
- ¾ cups powdered confectioners sugar
- 7 oz chocolate
- marzipan
- powdered confectioners sugar, for dusting
- unsweetened cocoa powder, for dusting
- fresh mint leaves, for garnish(optional)
Instructions
- 1
Preheat oven to 400°F.
- 2
Make marzipan mushrooms by cutting a piece from the block, dividing it in half widthwise. Dust with powdered sugar and roll one half into a ball, tapering one side into a point for the cap. Roll the other half into a 3-inch log, cut in half, and shape one end to a point for stems. Insert pointed stem into mushroom cap and set aside.
- 3
Using a stand mixer, beat eggs and superfine sugar for 4 minutes until doubled.
- 4
Sieve flour and sea salt together, then gently fold in with a spatula. Add salted butter and continue mixing.
- 5
Grease a rimmed baking sheet with butter, line with greaseproof paper, and spread batter evenly.
- 6
Bake for 10 minutes.
- 7
Cream salted butter in stand mixer for 4 minutes until white and soft.
- 8
Melt chocolate in microwave, heating for 1 minute and stirring, then 30 seconds more until smooth. Cool.
- 9
Mix eggs with powdered sugar in stand mixer until doubled.
- 10
Fold melted chocolate into egg mixture, then fold in creamed butter.
- 11
Transfer warm cake to a clean kitchen towel, remove paper, and roll into a round shape. Cool completely.
- 12
Combine superfine sugar, water, and vanilla extract in a pan, bring to boil, and stir until sugar fully dissolves.
- 13
Unroll cooled cake and brush syrup over the top with a pastry brush.
- 14
Spread half the chocolate buttercream over syrup and roll cake into a log. Brush with more syrup.
- 15
Cut log into 3 uneven pieces and arrange together to resemble wood pieces.
- 16
Coat outside with remaining buttercream using sweeping motions to create bark texture.
- 17
Top with marzipan mushrooms dusted with cocoa powder and fresh mint leaves if desired.
Tips
Beat eggs and sugar until truly doubled; this incorporates air crucial for a light, airy sponge cake.
Cool the cake completely before unrolling to prevent cracking; rolling while warm helps set the shape.
Use a serrated knife and gentle sawing motions when cutting the final log into pieces to avoid crushing the delicate cake.
Good to Know
Wrap cooled yule log in plastic wrap and refrigerate up to 3 days. Keep marzipan mushrooms in an airtight container at room temperature separately; add just before serving to prevent moisture absorption.
Prepare marzipan mushrooms up to 1 week ahead and store in airtight container. Bake sponge cake and prepare buttercream 1 day ahead. Assemble and decorate no more than 4 hours before serving for best texture.
Slice with a warm, damp knife between cuts. Serve at room temperature or chilled, depending on preference. Pairs well with coffee, hot chocolate, or dessert wine like Barsac.
Common Mistakes
Do not overmix flour into eggs to avoid gluten development and a dense, tough cake.
Do not roll the warm cake too tightly or unevenly to prevent cracking or misshapen final form.
Do not skip cooling the cake completely before final assembly to avoid buttercream melting and sliding.
Substitutions
Gluten-Free Swaps
ensure xanthan gum included
General Alternatives
structure may differ; mousse-style
Full guide →FAQ
Can I make the yule log a day ahead?
Yes. Assemble and decorate up to 4 hours before serving. Prepare components (sponge, buttercream, marzipan) separately 1 day ahead and refrigerate. Unroll and assemble the final cake the day of serving for best structure.
What if my cake cracks when rolling?
Ensure the cake is warm when rolling and use a clean towel to guide it gently. If cracks appear, spread extra buttercream into crevices during final assembly. The bark-like texture will disguise small imperfections.
Can I freeze the baked sponge cake?
Yes, freeze the unrolled sponge cake wrapped tightly in plastic wrap up to 1 month. Thaw at room temperature before unrolling and syruping. Do not freeze the assembled buttercream cake as texture deteriorates.