Roast rhubarb with pistachio cake

Roast rhubarb with pistachio cake
  • Serves icon Serves 10-12
  • Time icon Hands-on time 40 min, oven time 2 hours 40 min, plus cooling

Debbie Major serves her moist pistachio cake with tangy slow-roasted rhubarb and pistachio ice cream in this must-try dessert recipe.

Discover more ways with rhubarb including this warm vanilla and rhubarb sponge pudding. 

Nutrition: For 12

Calories
427kcals
Fat
28.9g (7.3g saturated)
Protein
9g
Carbohydrates
30.6g (24.2g sugars)
Fibre
1.6g
Salt
0.3g
Calories
427kcals
Fat
28.9g (7.3g saturated)
Protein
9g
Carbohydrates
30.6g (24.2g sugars)
Fibre
1.6g
Salt
0.3g

Ingredients

For the slow-roasted rhubarb

  • 800g forced rhubarb (untrimmed weight)
  • 1 large orange
  • 250g caster sugar

For the cake

  • 200g shelled unsalted pistachios
  • 100g plain flour
  • 1 tsp baking powder
  • 100g ground almonds
  • 3 large free-range eggs
  • 250g caster sugar
  • Finely grated zest 1 large orange
  • ½-1 tsp rosewater
  • 125ml extra-virgin olive oil
  • 100g lightly salted butter, melted and cooled
  • Icing sugar for dusting

To serve

  • Good quality pistachio ice cream (I like Antonio Federici, from larger supermarkets)

Method

  1. For the rhubarb, heat the oven to 110°C/fan90°C/gas ¼. Wipe the rhubarb stalks clean, trim off the ends and cut into 5cm long pieces. Peel 3 wide strips of zest from the orange and cut them across into pine needle-like shreds, then squeeze the juice from the orange.
  2. Arrange the rhubarb pieces in large shallow roasting tray and scatter over the orange zest and sugar. Squeeze over the orange juice. Cover the tin tightly with foil and bake for 1½ hours. Remove from the oven, uncover and carefully pour the released juices into a pan. Boil rapidly for 5-6 minutes until slightly reduced. Cool, then pour back over the rhubarb. Chill if you wish.
  3. For the cake, turn up the oven to 160°C/fan140°C/gas 3. Put the pistachios into a pan of boiling water and simmer for 8 minutes. Drain, then wrap in a clean tea towel and rub to loosen the skins. Remove the nuts, picking off any stubborn pieces of skin. Spread on a baking tray and bake for 10-12 minutes until dry but not browned. Cool, then grind in a food processor until quite fine. Add the flour and baking powder and grind to an even finer mixture. Stir in the ground almonds.
  4. Grease and line a 23cm loosebottomed cake tin with non-stick baking paper. Put the eggs and sugar in a large bowl and whisk with an electric mixer for 5-7 minutes until thick and moussey. Whisk in the orange zest and rosewater. Reduce the speed and slowly drizzle in the oil, then the melted butter, around the edge of the mixture, waiting for each addition to be mixed in before adding the next. Retain as much volume as you can in the mix.
  5. Gently fold in the ground pistachio mixture with a metal spoon, then pour into the prepared tin and lightly level the top. Bake for 50 minutes or until a skewer pushed into the middle comes out clean. Leave to cool in the tin for 10 minutes, then remove and leave to cool on a wire rack if you wish (see introduction). Dust lightly with icing sugar, cut into slices and serve with the rhubarb and scoops of pistachio ice cream.

delicious. tips

  1. If you’re short on time, you can add the pistachios without boiling and skinning them. You’ll have a slightly more textured but equally wonderful cake. You can also find nibbed pistachios, which are already skinned, in some Middle Eastern shops. They’re bright green and make beautiful decorations. They freeze well so it’s worth stocking up when you find them.

    Debbie says: “You can serve the cake and the roasted rhubarb warm if you like, or leave them to cool first. If serving warm, you’ll need to gently heat the rhubarb in the hot oven just before serving.”

  2. Make the pistachio cake up to 2 days in advance and keep well wrapped somewhere cool, or freeze for up to 1 month, well wrapped in cling film and foil.

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  1. I love this recipe because it is delicious in all seasons. It’s unabashedly British with the delicious country rhubarb, with an exotic twist from the creamy pistachios. Its beauty lies in its versatility. It can be dressed up as a understatedly elegant show-stopper with a dusting of pistachio flavoured icing sugar. Or mid-week cakey treat, served either with cool ice-cream in the summer, or steaming hot vanilla custard in the winter (which is great for those craving a retro hit of nostalgia with the old rhubard and custard sweets).

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