Make 5" straight lines in parchment paper using a pencil. Turn the paper over and use it to line a sheet pan
In a large pot, heat the water, butter, milk, sugar, vanilla and salt on medium heat until the mixture boils
When the mixture boils dump all the flour at once and mix vigorously with a wooden spoon until all the white specks disappear and the dough pulls away from the walls of the pot
Place the dough in a mixer fitter with a paddle attachment and mix on medium speed for a few minutes to cool down the dough
In a small bowl, whisk all the together until combined
Slowly add the eggs into the dough while the mixer is still running
Pate Au Choux should be shiny and hold its shape
Place dough in a piping bag fitted with a star tip
Using the straight lines as a guide, pipe the eclairs onto the parchment paper lined cookie sheet
Freeze dough for a couple of hours
Preheat oven to 350 degrees F
Bake for 35-45 minutes or until eclairs are golden and firm to the tough
Remove from heat and cool
Make 3 holes on the bottom using a knife or piping tip