Make the pastry (it's easiest in a food
processor). Whizz the flour, sugars and a
pinch of sea salt for a few seconds. Add the
butter. Whizz for another few seconds until
the mixture looks like coarse breadcrumbs.
Whisk the egg yolk with 2 tbsp ice-cold
water in a small bowl, then pour into the
flour mixture. Whizz until the pastry has
collected in a ball around the spindle, then
remove it and press into a fat disc. Wrap
the pastry in cling film and leave to rest
in the fridge for at least 30 minutes.
Bring the pastry back to cool room
temperature and roll it out thinly on a
well-floured surface. It is very short and
crumbly, so work it quickly on a cold
surface and patch up any tears using
a little flour dabbled with a wet pastry
brush. Line a loose-bottomed 25-26cm
x 4cm tart tin, so it's slightly proud of the
tin. Chill for at least 30 minutes.
Preheat the oven to 200C/gas 6/
fan 180C. Line the pastry with foil, then
pour in ceramic or dried beans.
Bake for 12-14 minutes, remove the foil
and beans and cook for a further
5 minutes or until the pastry is no
longer raw-looking but remains
uncoloured. Remove from the oven
and put to one side while you get the
Put the creamed coconut in a
heatproof bowl and add 150ml/¼ pint of
boiling water. Whisk until the coconut
has dissolved, then leave to cool.
Put the remaining ingredients,
except the double cream, into a food
processor and whizz to combine.
(The syrup and treacle can be weighed
together and are easier to pour if the
cans have been warmed first. Use a
plastic spatula to scrape every last jot
into the processor.) Add the cooled
creamed coconut and double cream
and whizz again.
Preheat the oven to 170C/gas 3½/fan
150C. Put the tart tin on to a heavy
baking sheet. Pour the filling in to reach
the top of the pastry - it doesn't rise much
so it won't overflow. Bake for 40-50
minutes, or until the tart is golden and
set. Leave to cool for at least 15 minutes
before serving warm or at room
temperature. Serve dusted with icing sugar, with a jug of crème fraîche or
double cream alongside.