The fastest-growing chicken chain in America grew sales 21.5%. However, that's nothing new for Wingstop — in March, the company reported 12 consecutive years of sales growth. According to executives, the chain has beat the competition by sticking to a formula that works.
"When we started 21 years ago, we sold wings, sides, and fries," Morrison told Business Insider last year. "We've had the same three sides on the menu since the beginning. We've added boneless wings over the years, and we've added two new flavors. That's innovation for us."