Double chocolate eclairs

• milk↗350ml ml
• vanilla extract↗1 tsp tsp
• medium egg yolks↗4
• caster sugar↗50g g
• cornflour↗1 tbsp tbsp
• dark chocolate↗75g g

  (70%) chopped

• milk↗4 tbsp tbsp
• unsalted butter↗50g g

  diced

• plain flour↗100g g

  sifted

• caster sugar↗1 tsp tsp
• medium eggs↗3

  beaten

• double cream↗100ml ml
• soft light brown sugar↗1 tbsp tbsp
• vanilla extract↗1 tsp tsp
• dark chocolate↗100g g

  (70%), chopped

• unsalted butter↗25g

Step-by-step instructions

1. 1

   To make the filling, heat the milk and vanilla to boiling point. Meanwhile, whisk the egg yolks and caster sugar until pale, then stir in the cornflour. Pour the hot milk over the egg yolk mixture and whisk until smooth. Return to the pan and heat gently, stirring constantly, until thick.

2. 2

   Put the thick custard into a clean bowl, add the chocolate and stir until melted. Cover the surface with cling film and leave to cool completely.

3. 3

   Heat oven to 220C/200C fan/gas 7. To make the pastry, heat the milk, butter and 4 tbsp water over a gentle heat until the butter melts. Increase the heat and bring to the boil, then remove from the heat and quickly beat in the flour, sugar and a pinch of salt. Keep stirring until the mixture is smooth, glossy and comes away from the sides of the pan. Allow to cool for a few mins, then gradually add the eggs, mixing well between each addition until the mixture reluctantly drops off the spoon, don’t add all the egg unless you need to.

4. 4

   Line a baking sheet with parchment, then spoon the pastry mix into a piping bag fitted with 1cm wide star or round nozzle, or into a disposable piping bag with a similar-size hole snipped off for piping. Pipe 12-14 even buns, about 10cm long and 2cm wide, leaving space for expanding between each one. Bake for 15 mins or until golden brown and doubled in size. Cool.

5. 5

   For the glaze, heat the double cream, sugar and vanilla to boiling point. Put the chopped chocolate in a heatproof bowl and pour over the cream mixture. Stand for 2-3 mins, then add the butter and stir until smooth and glossy.

6. 6

   To assemble the eclairs, cut them in half lengthways and pipe in the filling. Spread the chocolate glaze over the top of each eclair and leave to set before serving.