Éclair — The Perfect Piping Line and the Fondant Decision

Ingredients

• For the choux pastry
• 125 ml water
• 55 g unsalted butter, cut into cubes
• 70 g plain flour, sifted
• 2 eggs, beaten, added gradually
• 1 pinch fine salt
• For the filling
• 500 ml whole milk
• 4 egg yolks
• 100 g caster sugar
• 40 g cornflour
• For the fondant glaze
• 300 g ready-made fondant, coffee or chocolate; warmed to 35–37°C

Method

1. 1
   Prepare the choux batter. Bring water, butter, and salt to the boil in a heavy saucepan. Add the sifted flour in one addition and beat vigorously over the heat until the dough pulls cleanly from the sides of the pan and forms a smooth mass. Remove from the heat and beat in the eggs gradually, adding only enough so that the batter falls from a spatula in a slow, reluctant ribbon — neither stiff nor slack.
2. 2
   Pipe the éclairs. Fill a piping bag fitted with a plain 1.5 cm nozzle. Hold the bag at 45° to the lined baking tray, the tip 1 cm above the surface. Apply absolutely consistent pressure throughout each stroke, piping lengths of 12 cm. Any variation in pressure will produce bulges in the finished shell. When the tray is complete, stand at its end and look along the line: each éclair must be identical in width, height, and length — deviation is visible immediately.
3. 3
   Bake at 180°C with the fan on very low or off for the first 15 minutes, allowing maximum steam rise and full expansion of the shells. Then reduce the temperature slightly, open the oven door briefly to release accumulated steam, and continue baking until the shells are deep golden, rigid to the touch, and completely dry on their undersides. The crust must be firm enough to hold its shape when cooled; a shell that yields under light finger pressure has not dried through.
4. 4
   Cool completely before proceeding. A warm or internally steamy shell will cause the cream to run. The interior must be fully dried; the exterior fully set.
5. 5
   Fill from both ends. Pierce two small holes — one at each end of the underside. Fill from one end, then from the other, until the cream meets in the middle. This is where the dish lives or dies: a single filling point from one end leaves an air pocket at the far end. When filled correctly, the éclair feels uniformly weighted along its whole length — no zones of greater resistance and no areas of emptiness when the shell is pressed gently.
6. 6
   Glaze with fondant. Warm the fondant to 35–37°C — identical to the working window of a mirror glaze. Hold each filled éclair inverted, dip the top surface into the fondant, draw it clear in a single fluid motion, and turn it right-side up. Any surface disturbance after the dip produces streaks. The fondant must be set and non-tacky within 60 seconds. If it remains tacky after 90 seconds, the fondant is too cool or too diluted.