Tart rhubarb and sweet white chocolate is a delicious flavour pairing, and one I will keep returning to for the duration of the rhubarb season. In this bake I’ve applied the combination to a classic frangipane tart, using rhubarb compote in place of jam, and a filling studded with chocolate chunks and flavoured with cardamom. It’s a winner, and in my opinion, better than the standard strawberry variety (controversial).
Ingredients (enough for one 7.5 inch wide/ roughly 2 inch deep tart tin- serves 8)
For the pastry (there will be some leftover which will freeze well)
250g plain flour
140g unsalted butter
30g caster sugar
2 egg yolks
For the rhubarb filling
400g rhubarb, sliced into 2 inch batons
juice and zest 1 orange
30g caster sugar
For the almond frangipane
120g soft unsalted butter
120g caster sugar
2 large eggs
120g ground almonds
1tsp ground cardamom
100g white chocolate, roughly chopped
30g roughly chopped almonds
Start off by making the pastry. Place the flour, butter, sugar and salt in a food processor and pulse until it resembles breadcrumbs. At this stage add the egg yolks and pulse again until the mix comes together in large lumps (alternatively, rub the butter into the flour, salt and sugar using your fingertips then stir in the yolks using a cutlery knife). Tip the dough out and shape into a disc using your hands. Wrap in cling film and chill for 20 minutes.
While the pastry is chilling start on the rhubarb compote filling. To do this simply put 300g of the rhubarb (reserve the other batons for the top of the tart), the orange juice and zest in a saucepan along with the caster sugar. Heat gently, stirring often, until the rhubarb has broken down and reduced to a thick compote consistency. Set aside to cool.
Lightly grease an 7.5 (or 8) inch straight sided tart tin. Retrieve your pastry from the fridge and roll out to around 3mm thick and line the tin, pushing it right into the corners and trimming any excess. Prick the base all over with a fork and chill for 20 minutes or until firm. Preheat the oven to 190c.
Line the pastry case with baking paper and fill with baking beans. Bake for 15-20 minutes or until the walls of the pastry are cooked and supporting themselves. Remove the beans and baking paper and return to the oven until the base is crisp and cooked through (about 10 minutes). Set aside to cool.
While the pastry is baking, toss the reserved rhubarb batons in 1tbsp caster sugar and place on a tray- bake for 10 minutes.
Now it’s time to make the frangipane. To do this simply cream together the butter and sugar until pale, light and fluffy, then add in the eggs one at a time, beating well between each addition. Finally, tip in the cardamom, salt and almonds and briefly mix once more until combined. Reduce the oven temperature to 170c.
Now it’s time to assemble the tart. Spread the rhubarb compote over the base in one even layer, then add half the frangipane and sprinkle over half the chopped white chocolate pieces. Add the remaining frangipane and top with the rest of the white chocolate, chopped almonds and roasted rhubarb batons.
Bake for 35-40 minutes or until golden brown and cooked through. Serve hot or cold.
Crisp choux pastry, sharp roast rhubarb with a hint of vanilla, and butterscotch-sweet caramelised white chocolate cream; a delicious combination you’ve got to try, and a great way to celebrate seasonal British produce (and millennial pink… *sigh*).
Ingredients (makes 10-12)
For the choux
85g unsalted butter
100g plain flour
pinch of salt
For the filling
250g white chocolate (make sure it’s at least 30% cacao)
300ml double cream
4 thick stems rhubarb
3tbsp caster sugar
2 vanilla pods or 1tsp vanilla extract
Juice and zest 1 lemon
For the topping
100g icing sugar
Enough of the rhubarb syrup (leftover from roasting the rhubarb) to create an icing with a drizzle-consistency
Dried rose petals (optional)
Candied rhubarb ribbons (optional) (I make these by creating ribbons of rhubarb with a peeler, which I then simmer in a simple 2 parts sugar: 1 part water syrup for 5 minutes before draining off any excess liquid and cooking at 160c for 10-15 minutes, or until dried out, on a lined baking tray)
To make the choux put the water, butter and salt in a saucepan set over a medium heat (do not let it boil at this stage). Meanwhile, sieve the flour to remove any lumps. When the butter has melted into the water, increase the heat and bring to a rolling boil, then tip in the flour and stir vigorously until you have a smooth paste-like mix which comes away from the edges of the pan. Continue to stir for another minute to cook out the rawness of the flour, then tip into a clean bowl and close cover with cling film (this eggless stage is known as a ‘panade’). Leave to cool to room temperature.
Preheat the oven to 190c. Line 2 large baking trays with greaseproof paper.
Once the panade has cooled it’s time to add the eggs; whisk in a jug to break them up then very gradually add into the panade while beating with electric beaters. Stop adding the egg (you might have a little leftover) when the smooth, lump-free mixture reluctantly drops off the end of a spoon. Pile the choux mix into a piping bag, fitted with a large round nozzle.
Pipe 10-12 doughnut shapes onto the prepared baking trays, leaving room for expansion. Bake the choux for 20-25 minutes or until crisp and golden, then skewer each one and return to the oven for around 10 minutes or until the middles have completely dried out. Set aside to cool and reduce the oven temperature to 180c.
Slice the rhubarb into batons and toss in the caster sugar, lemon juice and zest and vanilla. Roast for 10-15 minutes in a high sided baking tray until the pieces are tender but still retain their shape. Set aside to cool and reduce the oven temperature to 120c.
Chop up the white chocolate and scatter on a lined baking tray in an even layer. Place in the oven to allow the chocolate to melt for 10 minutes, then stir/turn and return to the oven for another 10 minutes. Repeat this step 2-3 more times until the chocolate reaches a deep golden colour, then scrape into a bowl and mix in a splash of cream to loosen the consistency (it can get a little grainy at this stage so pass through a sieve if necessary). Leave to cool.
Once the white chocolate has cooled, place in a bowl (or bowl of a stand mixer with whisk attachment) and add in the cream and salt. Whisk until pipe-able.
Slice the cooled choux nuts in half horizontally and pipe in a generous helping of caramelised white chocolate cream. Slice the roast rhubarb pieces thinly and arrange these on top of the cream, then pop the choux lid on top.
For the pink icing, pour the cooking syrup from the rhubarb tray into the icing sugar and mix to create a smooth drizzle-like consistency (add in a little water if you don’t have enough syrup). Spoon this over the filled choux-nuts and garnish with edible petals and rhubarb ribbons.