Add butter, water, and salt into a pot. Heat until the butter is melted
Remove pot from heat and add in the flour. Mix until combined.
Let cool for 15 minutes
Add in the eggs and mix well
Transfer the batter to a piping bag and pipe out 1.75inch wide choux. Make sure to leave at least 1 inch of space in-between
Add the craquelin (cookie crust) from earlier on top
Bake at 190C/375F for 25 minutes