Place water, unsalted butter and salt into a small saucepan. Over medium-high heat, melt the butter until the water starts to boil.
Once boiling, add flour a little at a time while mixing. Mix over the heat once all the flour is in, stirring vigorously for 3 to 4 minutes.
Your dough should come together in a ball and be smooth and slightly shiny.
Take the pot off the stove and set it aside to cool for 10 minutes.
While your dough is cooling, set up your electric hand mixer or stand mixer. (Refer to Note 1)
Crack the eggs into a separate bowl or jug and whisk well. This allows you to add what is needed, as too much egg can make the dough runny.
Preheat your fan-forced oven to 175°C.
When the 10 minutes is up, place the dough into the mixing bowl and on a low speed, mix the dough for about a minute, this releases any heat that is still trapped inside and prepares the dough for you to add the eggs.
Turn the speed to medium and slowly pour the whisked eggs into the dough. Only add a little at a time and allow the egg to incorporate into the dough before adding more. (Refer to Note 2)
Continue adding the eggs until the mixture becomes smooth and glossy.
Test your dough to see if it is ready at various intervals to avoid putting too much egg into the dough. (Refer to Note 3) (Refer to "How To Test Your Choux Pastry") Place some baking paper or parchment paper onto a baking tray. (Refer to Note 4)
Using a large round or open star piping tip (17mm in diameter) and a large piping bag (45cm or larger).
Fill the piping bag with the dough and pipe 10 to 12 cm long logs.
Use a little cold water to smooth down the ends, and then place in the oven to bake for 20 to 25 minutes or until a light golden brown.
Once the éclairs have finished baking, switch off the oven, but don't remove them just yet. Crack open the oven door and let them rest in the oven for about 15-20 minutes. This gradual cooling process helps to prevent the éclairs from deflating once they're taken out.
Once cooled, place them on a cooling rack and, using a chop stix or something similar, carefully create three holes at the bottom of each éclair. This is so you can pipe in the cream.