The dough is made without milk or eggs and if you replace the egg for glacing with the optional shiny glazing mix the recipe is vegan. The potato keeps the dough moist and tender, and a good portion of almond butter supplies the dough with an extra portion of fat and adds flavour. The almond flavour can be further enhanced when some grounded tonka bean is added to the dough, too. To archive a bubbly crust requires a well proofed preshaped doug. As I learned from a pizzaiolo the dough balls are in perfect condition, if you turn them and there is a lot of small and middle sized bubbles at their bottom.