Flour and Stone founder Nadine Ingram’s siren chocolate mousse cake recipe (2024)

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The founder of Sydney pastry shop Flour and Stone shares the recipe for her beautiful siren cake from her new cookbook, Love Crumbs.

Nadine Ingram

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Sydney baker and cookbook author Nadine Ingram’s cakes may not be the simplest affairs. Some of her best-known recipes involve layers of sponge and drifts of meringue, complex pastry technique and hours (or days) of dedication.

But the results are more than worth it: alluring, luxurious cakes with a “generous, home-made deliciousness”, as one interviewer describes them.

Ingram’s siren cake (below) is no exception, combining bitter chocolate, sour cherries and sea salt to make a dreamy wreath-like creation that’s “very mousse-y”, and definitely worth your time and effort.

The recipe explains how to make two sizes: 20cm for 10–12 people, or 25cm for 12–15 people. Choose your preference and follow the directions accordingly.

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Flour and Stone founder Nadine Ingram’s siren chocolate mousse cake recipe (1)

Siren cake

Bitter chocolate. Sour cherries. Sea salt.

A cake baked by the gods of the sea in celebration of an immortal Siren’s odyssey. Of bewitching songs to tempt a king’s heart that are still being sung. Feathered and finned all gather in a festival of flowers and fruit to set her free. A wreath of cherries floating on twilight waters met on the horizon by a sky of Napoli stars.

Cake size 20cm | 25cm

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INGREDIENTS

  • 180g | 220g Valrhona Manjari chocolate (minimum 64 per cent cocoa solids), plus extra 80g | 100g
  • 65g | 80g Valrhona Jivara chocolate (minimum 40 per cent cocoa solids)
  • 80g | 100g unsalted butter
  • 120g | 150g whole almonds, skin on and toasted
  • 6 | 7 eggs, separated
  • 130g | 160g caster sugar
  • 40g | 40g good-quality cocoa powder
  • pinch | pinch salt
  • ½ tsp | ¾ tsp sea salt flakes, plus extra to serve
  • 200g | 250g frozen sour cherries
  • clotted or thick cream, to serve (optional)

METHOD

  1. Preheat the oven to 140C fan-forced (160C conventional). Line a 20cm | 25cm round cake tin with baking paper using the following instruction. This cake will be baked in a water bath, so you need to use a conventional tin, not a springform tin, to ensure it doesn’t leak. On this occasion, you won’t be tipping the cake upside down to get it out, instead, you will be levering it out with the aid of two paper strips lining the base of the tin. So before you line the tin, lay a couple of long baking-paper strips approximately 5cm-wide and 40cm-long crossing over one another so they meet in the centre of the tin, then run the strips up the sides and let them fall over the rim. Now line the tin as you usually do and set it aside.
  2. Half-fill a deep tray large enough to fit your cake tin with water and place it in the preheating oven.
  3. Combine the 180g | 220g Manjari chocolate, all the Jivara chocolate, and the butter (sounds excessive but bear with me) in a large heatproof bowl and place over a saucepan of barely simmering water, making sure the bowl isn’t touching the water, to half-melt. Once half-melted, turn the heat off and leave the bowl on top of the saucepan.
  4. Meanwhile, place the extra 80g | 100g Manjari chocolate in a food processor and blitz to a fine crumb using the pulse function or pausing intermittently between 4-second spurts. This method allows the chocolate to fall from the sides of the processor back into the bowl and will ultimately form a fine, even crumb without the chocolate overheating or melting. Decant the chocolate into a bowl, then add the toasted almonds to the food processor and blitz using the same method until they are just roughly chopped. Remove 50g of the coarsest almonds to use for the top of the cake and continue to blitz the remaining almonds until they form fine crumbs, then add these to the bowl with the Manjari crumb.
  5. Place the egg yolks in the bowl of an electric mixer fitted with the whisk
    attachment and whisk on medium speed, then add half the caster sugar, increase the speed to high and beat until very pale and tripled in volume. Remove the bowl of chocolate from the saucepan and stir it to thoroughly combine the chocolate and butter, then, half at a time, gently fold through the whipped yolks using a spatula. Sift the cocoa directly over the chocolate mixture and fold it through until well combined. Add the ground almonds and chocolate crumbs and fold to combine. You’ll find that large bowl coming into play now.
  6. Whip the egg whites with a pinch of salt in a clean and dry electric mixer bowl fitted with the whisk attachment on high speed. When soft ribbons start to form, reduce the speed to medium and gradually add the remaining caster sugar, then beat until glossy and firm peaks form. Be careful not to overwhip.
  7. Gently fold half the whipped meringue into the chocolate, pressing out any
    lumps of meringue that may have formed. Fold in remaining meringue, then
    pour the cake batter into the prepared tin and smooth the top with an offset
    palette knife. Scatter the coarsely chopped almonds evenly over the top of the cake and sprinkle with sea salt.
  8. Place the cake tin into the water bath in the oven, ensuring the water comes
    halfway up the sides of the tin. If the tin starts to float, remove some of the
    water until it makes contact with the base of the tray again. Bake the cake for 25 minutes, then open the oven door and scatter the sour cherries over the top of the cake like a wreath. Reduce the oven temperature to 130C fan-forced (150C conventional) and bake the cake for a further 50 minutes.
  9. Once this time is up, the cake will spring back when pressed in the middle,
    although, it will still seem a little wobbly. Turn the oven off, leaving the cake in the oven with the oven door slightly ajar to cool for 1 hour. If your oven door doesn’t stay ajar by itself, use a wooden spoon wedged into the door to allow the heat to escape. Cooling the cake this way will help it to set and reduces the dramatic sinking that flourless chocolate cakes usually encounter.
  10. After 1 hour the cake can be removed from the oven and from the water
    bath to cool completely in the tin. Ideally, this cake should be set overnight
    or “express set” in the fridge for 4 hours because it is very mousse-y and this
    will make it easier to remove from the tin. To unmould the cake, gently tug
    at the four strips of baking paper hanging over the rim to release the cake
    from the base. Then pull upwards, angling the cake at 45 degrees to slide it
    out onto a serving platter. Even better if you have a friend who can pull up
    on two of the strips as you pull up on the other two. I recommend using
    a hot knife to cut this cake. Sprinkle with extra sea salt to serve. I like to
    serve it with clotted or thick cream.
  11. There is no need to refrigerate this cake after it has been removed from the tin. If you have leftovers, just leave it out at room temperature.

Serves 10-12 | 12-15

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Flour and Stone founder Nadine Ingram’s siren chocolate mousse cake recipe (2)

This is an edited extract from Love Crumbs by Nadine Ingram, published by Simon & Schuster Australia, RRP $54.99

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