In a pan over medium heat, combine the water and milk.
Add the butter, a pinch of sugar, and a spritz of biscuit, stirring until the butter is melted.
Bring the mixture to a boil, then take it off the heat.
Stir in the flour to create a dough.
Return the pan to medium heat and cook the dough for about one to one and a half minutes to allow moisture to escape.
Transfer the dough to the bowl of a stand mixer and use the whisk attachment on medium speed until the mixture cools and steam dissipates.
Add the eggs one at a time, mixing until a thick batter is formed.
Heat oil in a deep fryer or wok to 350°F (175°C).
Using two spoons, scoop portions of the batter and carefully drop them into the hot oil.
Fry the zeppoles until they are golden and puffed, then remove them and let them drain.
Before serving, toss the fried zeppoles in powdered sugar.
