Salted caramel swiss roll
- December 2012
- Serves 10-12
- Takes 45 minutes to make, 20 minutes to cook
Chocolate sponge, salted buttercream and chocolate ganache frosting all rolled into a swiss roll recipe that dreams are made of.
- 40.7g (21.4g saturated)
- 48.3g (43.6g sugars)
For 12 servings
For the sponge
- Butter for greasing
- 3 large free-range eggs, separated
- ½ tsp cream of tartar
- 100g caster sugar
- 1 tbsp milk
- 30g cocoa powder
- 30g plain flour
- ¼ tsp fine salt
- Icing sugar for dusting
For the meringue buttercream
- 120g caster sugar
- 2 tbsp golden syrup
- 120ml double cream
- 1 tsp Maldon sea salt
- 2 large free-range egg whites (about 75g)
- 150g granulated sugar
- 200g unsalted butter, at room temperature
For the chocolate ganache frosting
- 200g good-quality dark chocolate
- 200ml double cream
- 100g chopped toasted hazelnuts to decorate
- Preheat the oven to 180°C/fan 160°C/gas 4. Grease and line a swiss roll tin (about 25cm x 35cm) with baking paper. To make the sponge, whisk the 3 egg whites in a clean bowl until soft peaks form, then add the cream of tartar and whisk until stiff. In a separate bowl, whisk the 3 egg yolks and the 100g caster sugar until thickened and pale yellow. Add the milk, then whisk again until just combined.
- Sift the cocoa powder, flour and fine salt onto the egg yolk mixture then, using a large metal spoon, fold in until well combined. Gently fold in the egg whites, one third at a time, until well mixed, being careful not to knock out too much air, then pour into the prepared tin. Bake for 15 minutes until the top is springy and the sides begin to come away from the tin.
- Leave the sponge to cool in the tin for 10 minutes, then transfer to a cooling rack. While still warm, roll the sponge up from a short end (with the baking paper on), leave to cool completely, then unroll carefully. This will help when rolling the cake.
- To make the buttercream, combine the 120g caster sugar, 120ml water and the golden syrup in a heavy-based saucepan. Stir with a wooden spoon over a medium heat until the sugar has dissolved, then simmer for 3-5 minutes until it becomes a dark caramel (watch closely to make sure it doesn’t burn). Immediately remove from the heat, then carefully add the 120ml double cream and Maldon salt, stirring until smooth. Transfer to a bowl, then leave to cool completely.
- In a large mixing bowl, whisk together the 2 egg whites and the granulated sugar. When soft peaks form, place the bowl over a pan a half-filled with simmering water (don’t let the water touch the bowl). Stir until the sugar has dissolved and the mixture begins to resemble a runny marshmallow. Remove from the heat, then whisk with an electric hand mixer until the base of the bowl feels cool. Add the butter, about 25g at a time, whisking continuously.
- Add the cooled caramel to the butter and egg mixture, then whisk until just combined. Cover, then transfer to the fridge until needed.
- For the frosting, break the dark chocolate into a heatproof bowl. Heat the 200ml cream in a pan until it just begins to boil, then pour over the chocolate. Stir with a wooden spoon until the chocolate has melted and the ganache is thick enough to spread. Allow to cool completely.
- To assemble the cake, peel the baking paper from the sponge and place, smooth side down, on a fresh piece of baking paper dusted with icing sugar. Spread the buttercream over the sponge, then gently roll as in step 3. Place on a serving plate, then chill in the fridge for 15 minutes.
- Spread the ganache over the cake, leaving the ends bare, using a palette knife to create a textured finish. Scatter with the nuts, then serve.
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