"They're lighter, they're fluffy, they're chewy and they taste a lot like they're homemade - or something that you would get at a fair and only get once a year," he says. "So, the fact that you can get that seven days a week now is pretty awesome."

For other entrepreneurs starting out with a similar business idea, Kellis says you need a mix of timing and luck, but above all, a product you believe in.

"I love doing this," she says. "I could just get on my knees and thank the universe that I get to do what I enjoy. I hope people can taste the passion."