Heat water, butter and salt until it comes to a boil.
Add flour all at once and cook until the mixture reaches 92°C. Cool at 60 - 65°C, put in planetary mixer at medium-high speed and slowly add the eggs and then the egg white.
Mix until a creamy mass is obtained, translucent and smooth.
Dress the cream puffs on micro-perforated mats inside in a diameter steel ring (18 cm) so to obtain a crown shape.
Place on each puff a small disc of red craquelin.
Bake in a ventilated oven at 180°C for about 25 to 30 minutes, with the valve closed for the first 15 to 18 minutes.