Chocolate Bûche de Noël is a refined entremet built on a crisp chocolate shortcrust base that delivers structure and a clean snap. A layer of chocolate marshmallow adds lightness and gentle sweetness, contrasting with the components above it. The double financier insert contributes a toasted, nutty depth and a satisfying bite, while the dark-chocolate mousse brings intensity and a well-defined bitter edge. Everything is enclosed within a milk-chocolate and hazelnut mousse that softens the sharper notes, creating a rounded, aromatic finish. Texturally, it shifts from crisp to tender, airy to creamy, with nutty undertones weaving through each layer to produce a coherent, well-balanced flavour profile.
Chocolate Bûche de Noël Tutorial – Professional Mousse and Assembly Tips
The tutorial below focuses on technique rather than speed, so you can clearly see each stage of the milk-chocolate mousse and how it integrates into the full entremet. I walk through the textures you should be looking for, the timings that matter, and the practical checks that prevent common failures. You’ll also see how the components fit together inside the mould, giving you a clearer understanding of the structure before you attempt the final assembly. This way, whether you’re recreating the full bûche or only the mousse element, you’ll have a reliable, repeatable method to work from.
Chocolate Bûche de Noël
Ingredients
Financier Sponge
- 130 g unsalted butter
- 80 g flour
- 235 g caster sugar
- 180 g almond meal
- 200 g egg whites
- Zest of 1 lemon
Dark Chocolate Mousse (~325 ml)
- 100 g dark chocolate 60%
- 75 g heavy cream 35% for ganache base
- 150 g heavy cream 35% whipped
Chocolate Marshmallow
- 180 g dark chocolate 72% cacao chopped
- 22 g powdered gelatin
- 110 ml cold water for hydrating gelatine
- 125 g honey for the gelatine mixture
- 50 g water for the syrup
- 100 g honey for the syrup
- 280 g sugar
- Canola oil spray for greasing the frame
Hazelnut Milk Chocolate Mousse (~400 ml)
- 2 g gelatine powder
- 10 g cold water
- 150 g heavy cream for whipping
- 150 g milk chocolate
- 20 g hazelnut praline 50% ideal, any works
- 65 g heavy cream for heating 33–35%
- 10 g Frangelico
Instructions
Financier Sponge
- Make brown butter (beurre noisette), strain it, and let it cool to lukewarm.
- Mix sugar, ground almonds, and flour.
- Lightly whisk the egg whites, then stir in the dry mix and lemon zest.
- Gradually add the brown butter, mixing until smooth.
- Pipe into your chosen moulds or spread onto a 25 × 30 × 1 cm (10 × 12 in) silicone mat.
- Bake at 190°C (374°F) for 15–20 minutes, until golden.
- Cool on a wire rack, then cut to shape. Cut the stripe to fit into the mould. Freeze for easier assembly.
Dark Chocolate Mousse
- Bring 75 g cream to a gentle boil, then pour over chopped chocolate. Leave for a few seconds, then stir. Blitz with stick blender until smooth and glossy. Cool the mixture to 25°C (77°F).
- Whip 150 g cream to soft peaks. Add to ganache in two additions, gently folding to preserve volume.
- Pour mousse into mould and arrange financier sponge on top.
Chocolate Marshmallow
- Line a baking tray with parchment and place a lightly oiled cake frame 25×35 cm on top (thickness would be ~1 cm)
- Melt the chocolate in the microwave or over a water bath and cool it to 45°C (113°F).
- Bloom the gelatine in cold water. Combine the gelatine mass and honey in the stand mixer bowl.
- Cook the sugar, honey, and water together in a saucepan until the syrup comes to a boil.
- Start whisking the gelatine mixture on medium-high speed and slowly stream in the hot syrup. Whip until thick, glossy, and reaching ribbon stage.
- Add the chocolate, cooled to approximately 45°C (113°F), and mix until smooth.
- Spread the mixture evenly into the prepared frame, line with another lightly oiled baking paper, leave to set completely (~12 hours), preferably overnight.
- Once set, cut the stripe to fit into the mould.
Hazelnut Milk Chocolate Mousse
- Bloom the gelatine powder in cold water.
- Semi-whip the cream and refrigerate.
- Chop the milk chocolate if not using callets and place it in a tall jug.
- Combine the hazelnut praline, heavy cream and Frangelico in a small saucepan and bring to a simmer.
- Add the gelatine mass and mix briefly until fully dissolved.
- Pour the hot mixture over the milk chocolate and blend with a stick blender until smooth.
- Cool the mixture to 25°C (77°F).
- Fold in the semi-whipped cream.
- Assemble the cake with inserts and freeze for a minimum of 7 hours or overnight.
Video
Notes
Yule Log Mousse Cake: Tutorials for Each Component
Master your Yule Log Mousse Cake with step-by-step tutorials for every component. Each video guides you through essential techniques, from the crisp chocolate shortcrust base to the airy chocolate marshmallow and rich dark chocolate mousse, finishing with a perfectly tender financier sponge. Follow these resources to build a flawless, professional entremet with balanced textures and flavours.
• Chocolate Shortcrust: Learn to make a crisp, even chocolate shortcrust base that forms the perfect foundation for your mousse cake. https://andbonbons.com/chocolate-shortcrust-pastry-recipe/
• Dark Chocolate Mousse: Discover how to create a smooth, stable dark chocolate mousse that adds depth and richness to your Yule Log. https://andbonbons.com/sacher-mousse-cake-recipe-017/
• Chocolate Marshmallow: Master a light, airy chocolate marshmallow with perfect texture and sweetness for layering in your entremet. https://andbonbons.com/chocolate-marshmallow-recipe/
• Financier Sponge: Achieve a nutty, tender financier sponge that supports the mousse layers while adding structure and flavour. https://andbonbons.com/financier-sponge/
Chocolate Marshmallow Layer for Yule Log Mousse Cake
Using chocolate marshmallow as a layer insert in your Yule Log Mousse Cake creates an airy yet stable texture that supports the surrounding mousse layers. For a more mousse-forward dessert, you can make a double marshmallow insert and skip the financier sponge entirely. With its moderate sweetness, this approach results in a dessert that is intensely chocolate-flavoured while still maintaining lightness and structural integrity.
Chocolate Entremet – Nutty Flavours and Complementary Techniques
A well-balanced chocolate entremet combines texture, depth, and flavour in every layer. To enhance the natural richness of milk chocolate, hazelnut provides the perfect nutty complement. You can make your own hazelnut praline following a method similar to my almond praline tutorial, or simply use a good-quality store-bought version. Adding a splash of Frangelico liqueur further elevates the nutty notes; if Frangelico isn’t available, a similar liquor like Baileys works as an excellent substitute. These simple touches bring warmth and depth to your entremet, rounding out the chocolate and creating a more sophisticated flavour profile.
EXPLORE MORE BÛCHE DE NOËL RECIPES
If you love creating entremets, you might enjoy exploring some of my other Bûche de Noël recipes. Each one offers a unique flavour profile and assembly technique, perfect for expanding your pastry skills:
- Raspberry Bûche de Noël – https://andbonbons.com/raspberry-buche-de-noel-yule-log-recipe-01/
- Orange Bûche de Noël – https://andbonbons.com/orange-buche-de-noel-orange-entremet-02/
- Coffee Bûche de Noël – https://andbonbons.com/coffee-buche-de-noel-03/
- Dark Berry Bûche de Noël – https://andbonbons.com/dark-berry-buche-de-noel-buche-entremet/
- Blackberry Bûche de Noël – https://andbonbons.com/blackberry-buche-de-noel-yule-log-entremet-06/
These recipes are perfect for discovering new flavour combinations, practising advanced techniques, and enjoying the elegance of layered entremets at home.
MOULDS USED IN THIS RECIPE
Kit Woody 1100 mould – silicone mould set with two components and support frame, designed to create a realistic woodpile-style bûche: https://www.silikomart.com/en/professional/pasticceria/kit-woody-1100
Craving more behind-the-scenes moments, step-by-step videos, and sneak peeks of upcoming recipes? Join me on Instagram @andbonbons for a closer look at the process, pastry tips, and plenty of chocolate inspiration.
