Sparke said Crankworx was not initially interested in having her food truck at the event, however, once it was clear there was a hole in the market for vegan and vegetarian options - they were interested.
The truck creates vegan alternatives for the well-known Big Mac and fried "chicken" burgers, as well as vegan aioli and fries.
With homegrown vegetables, homemade sauces and crafted "mock" meats - everything in the burger, bar the bun, has been made from scratch.
She said sales had been incredible, with the family-run truck flat out and customers coming back three times a day.
The feedback was extremely positive, with big-name mountain biker Casey Brown singing her praises, she said.
A personal favourite moment for Sparke at the event was when a man stormed up to her truck after his burger and yelled "there was no meat in my burger and it was a delicious", before throwing down the empty box.
The truck had been in the works for three years, as Sparke and her mother saw a gap in the market for "vegan junk food".
"Everyone told us not to do it in Rotorua as they thought we would fail, but I wanted to as it is my hometown."
Crankworx was the first big event the van had vendored for, with Sparke saying this was their first chance to "dip their toes in a big festival" on home soil.
The van planned to give the event another go next year and decided they will bring in a vegan breakfast burger to cover every meal.
But it is not just the food stalls benefiting from the big numbers.
Well-known mountain bike brand Evo Cycles has been a key retailer at the event, with owner Sam Fletcher saying customers were more engaged than ever.
After last year, the retailer decided to set up two sites for this year's event, however, Fletcher said after assessing the numbers, three was the goal for next year.