Put the water (250ml), oil, and salt in a heavy pan and bring to the boil

Turn the heat down and add the flour - beat togther until the mixture forms a ball then remove from heat

Heat the oil for deep frying until very hot

Using a icing syringe, pipe thick strips into the oil and fry until golden brown (if you haven't got one, see Tips below)

Place on a plate and sprinkle with the caster sugar

For the chocolate sauce place the chocolate and half the milk in a pan and heat

Dissolve the cornflour in the rest of the milk and mix into the chocolate together with the sugar

Continue heating the mixture on a low heat stirring constantly

Once the mixture has thickened remove from the heat and whisk until really smooth and serve with the warm churros (donuts)