This decadent and delicious chocolate tart is perfect as a dinner party dessert. Serve up generous slices, each with a scoop of good quality vanilla ice-cream, with coffee.

To make the pastry, rub the flour and butter together in a bowl with your fingertips until the mixture resembles rough breadcrumbs. Stir through the sugar and a little beaten egg until the mix comes together to form a ball. Press it into a flat oval, cover with cling film and place in the fridge to rest for 30 minutes.

Preheat the oven to 180°C/350°F/ Gas Mark 4. Dust a work surface with a little flour and roll out the pastry to 3mm in thickness and large enough to fit a 20cm diameter, 4cm deep fluted tart tin with a removable base. Line the tin with the pastry and press it into the sides before trimming the edges. As you line the tin, if the pastry crumbles, don’t panic, just patch it together.

Prick the base with a fork all over and line with foil, shiny side down, and fill with baking beans. Place the pastry shell in the oven to blind bake for about 15 minutes until the pastry is a light golden brown. Remove the tin from the oven, lift out the foil and beans and cook for a further 6-8 minutes until cooked through and lightly golden. Remove the tin from the oven again and allow it to cool on a wire rack.

Prepare the filling by placing all the ingredients in a heatproof bowl over a pan of simmering water. Mix until smooth and then pour into the cooled pastry case. Allow to set in the fridge for 1 hour, before dusting with gold powder, if using, and serving in generous slices with a scoop of ice cream and cups of coffee.