18th Dec 2017
The Bûche de Noël is the classic French Christmas cake and, come December, patisseries go all out creating the most elaborate, beautiful versions you have ever seen. These high-end cakes can also be extremely expensive; I have seen them sell for as much as €120. My version might be simpler, but it is still an impressive Christmas cake, and much cheaper!
For the chocolate sponge
butter, for greasing
70g plain flour, plus extra for dusting
4 large eggs
100g caster sugar
30g cocoa powder
For the decoration
125g hazelnuts, roughly chopped
¼ tsp edible gold powder (optional)
For the praline buttercream
50g milk chocolate (30-40 per cent cocoa solids), finely chopped
125g caster sugar
1 large egg
2 large egg yolks
225g unsalted butter at room temperature, diced
4 tbsp hazelnut praline paste (homemade or shopbought)
For the hazelnut syrup
40g caster sugar
2 tbsp Frangelico
Preheat the oven to 180ºC (160ºC fan oven)/gas 4 and grease a 33x23cm rimmed baking tray (known as a quarter sheet pan) and line with a sheet of baking parchment. Grease the parchment and then dust with a little flour, tipping out any excess.
To make the sponge, put the eggs and sugar in a large bowl and, using an electric whisk, beat until pale and thick, so that when the beaters are lifted from the bowl, the batter leaves a trail. Put the flour and cocoa powder in a bowl and mix together. In three additions, sift this mixture over the egg mixture, gently folding together with a spatula until fully combined. Pour this batter into the prepared baking tray and gently level out. Bake for 10-12 minutes until the cake springs back to the touch.
Meanwhile, put a tea towel on a work surface and cover with a piece of baking parchment. Remove the cake from the oven and immediately turn it out onto the parchment. Peel off the parchment from the base of the cake, and then carefully roll the cake tightly, with the parchment and tea towel inside. Leave to cool, wrapped inside the tea towel, for 20 minutes. This will help the cake to unroll and re-roll later without cracking.
Put the hazelnuts for the decoration on a baking tray and toast them in the oven for 10 minutes or until lightly browned. Set aside to cool.
To make the buttercream, melt the chocolate in a heatproof bowl over a pan of gently simmering water, making sure the base of the bowl doesn’t touch the water. Leave to cool slightly.
Meanwhile, put the sugar and 75ml water in a small pan over a medium high heat and bring to the boil. When the sugar has dissolved, cook until the syrup reaches 120ºC on an instant-read thermometer. When the syrup is around 115ºC, put the egg and yolks in the bowl of an electric mixer fitted with the whisk attachment and whisk until pale and thickened (this is best done using a freestanding electric mixer). Once the syrup reaches 120ºC, and with the mixer still running, carefully pour the syrup into the egg mixture. Continue whisking until the egg mixture has cooled to room temperature.
Add the butter, a few pieces at a time, beating until you have a silky smooth buttercream. Once all the butter has been added, add the praline paste and the melted milk chocolate, mixing to combine.
To make the syrup, put the sugar and 40ml water in a small pan and bring to the boil over a medium heat, then cook for 2 minutes. Remove the pan from the heat and pour in the Frangelico.
To assemble, unroll the sponge and remove the baking parchment, then brush liberally with the syrup. Spread three-quarters of the buttercream evenly across the sponge, then carefully roll it up tightly. Carefully lift the roll onto a serving plate and spread the remaining buttercream in a thin layer over the outside of the cake.
To make the decoration, put the chopped hazelnuts in a small bowl and mix with the gold powder, if using. Press the nuts onto the buttercream, coating the cake. The cake is best eaten on the day it is made, but it will still taste great up to two days later as long as it is kept in an airtight container. The buttercream can be made up to one week in advance. Store it in an airtight container in the fridge. Allow it to come to room temperature and beat it until light and fluffy before use.
Extracted from Patisserie Made Simple by Edd Kimber (Kyle Books, approx €19). Photography by Laura Edwards.
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