Bring the water, milk, salt, sugar and Crème Butter to a boil.
Remove from the heat and stir in the flour.
Dry the dough over a medium heat, then place in a mixer bowl fitted with a paddle.
Add the eggs a little at a time at low speed until the mixture is smooth.
Pipe the choux pastry into a wave shape (S), about 20 cm long, on a silicone sheet.
Cut out a crusty cracquelin of the same shape and diameter and place on the choux pastry.
Bake at 175°C for 35 minutes.