In-N-Out is run by 32-year-old Lynsi Snyder-Ellingson. She has always remained low profile and rarely goes out to make public appearances, but in her recent CBS News interview, she shared some secrets of the success of the burger joint her grandfather Harry Snyder, founded.

As summarized by Foodbeast these are In-N-Out's trade secrets:

In-N-Out Secret # 1: "It's about the quality, the friendliness, the cleanliness. We keep it simple."

No wonder they have kept their stores near the 600 mile radius from it's warehouse and product distribution center so that the quality of their food will stay fresh. They also have a reputation of paying their employees well above the federal minimum. It is reported that their managers can sometimes earn six figures, and the company as a whole has the lowest turnover rates in the industry.

In-N-Out Secret # 2: "We don't want to be in the spotlight. We don't want a bunch of attention. We want to do what we do best and that's serve good burgers to our customers. It's not about us here."

Snyder preaches simplicity and just focusing on the restaurant instead of her leadership and ownership of the empire. A mood that is well communicated across all its stores as they are committed in serving the best burgers and giving the best customer service.

When asked about any franchising plans for the successful burger joint, the 32-year-old Snyder said, "Never. The only reason we'd ever do that is for the money, and I wouldn't do it." As she recalls that her grandparents wants to keep things small by making each In-N-Out store family owned and run.

The popularity of In-N-Out is increasingly evident, in spite of having only 304 stores throughout six states, it has a reported value of $1.1 billion last year, according to Bloomberg.

"I think they would be amazed because they had no idea we would end up here," she said when asked about what her grandparents would think about the restaurants growth.