Doughnut Food Truck???

Here in Seattle there's a truck called Street Donuts that's doing it: http://www.streetdonuts.com/

Not sure if they have the entire process contained in the truck, though I suspect they aren't doing yeasted donuts. You might try contacting them.

I could be wrong, but I have a hard time imagining a truck with enough space to do yeasted donuts in large enough quantity to be profitable, since at a minimum you'd have to have a big mixer, a proofer, space to roll out and cut dough, a fryer (with adequate hood and ventilation), refrigeration, and rack space to store product, not to mention some kind of window with a counter to sell out of. Then you get into what it would take to do different flavors, fillings and toppings.

Just wondering why you want to do a truck vs. brick and mortar? Is it the high cost of rent, food truck trend, or lifestyle choice? Around here there seems to be a trend of brick and mortar shops starting trucks that just sell product (Top Pot Donuts is doing this) and businesses that started as trucks opening shops and restaurants.

Check with your health department first. In Phoenix, you are not allowed to prep food in the truck. That has to be done at the commissary. I'm also in agreement that you might not have the space to do what you want. Think of how many donuts you need to sell to make a profit and then visualize how much room they're going to need. And if you're going to proof donuts in the truck (I would be surprised that you could by HD standards), you might get into trouble if the proofing times aren't coordinated and you get a big hit.

One idea a friend of mine and I came up with (he's a culinary instructor) is to sell the excess pastries made at the school instead of tossing them in the trash every day like they do. We abandoned the idea because we didn't want to get involved with the school's politics. I bring this up because you might be able to do other items as well as donuts to compliment the menu. Good luck!

I envision sloshing vats of hot oil...

I think it can be done, no problem proofing, frying and making the toppings. The only thing I would worry about is showing and displaying your product properly. The whole thing about your homemade donuts is to show them off, so people can pick and choose. There is a Hot Molasada Truck in Hawaii that sells hot out of the fryer Portuguese donuts, they have been doing it for years, so it can be done..........Chefbillyb

you can have an electric proofer cabinet built into a mobile kitchen. 

There are many routes to go in mobile kitchens from having them professionally kitted to creating your own out of a box truck and \equipment.  Of course you really do need to work with your dept of health on this one otherwise you could be in for some nasty and costly surprises  and redoes once they do step in .

I have been using one like this for years..............