11. Bojangles'
2015 US average sales per unit: $1,838,700
US systemwide sales: $1.15 billion
10. Steak n Shake
2015 US average sales per unit: $1,866,900
US systemwide sales: $1.03 billion
9. In-N-Out Burger
2015 US average sales per unit: $1,959,200
US systemwide sales: $613.2 million
8. Zaxby's
2015 US average sales per unit: $2,174,300
US systemwide sales: $1.58 billion
7. Culver's
2015 US average sales per unit: $2,183,800
US systemwide sales: $1.20 billion
6. Chipotle
2015 US average sales per unit: $2,424,000
US systemwide sales: $4.50 billion
5. McDonald's
2015 US average sales per unit: $2,500,000
US systemwide sales: $35.80 billion
4. Panera Bread
2015 US average sales per unit: $2,500,000
US systemwide sales: $4.90 billion
3. Whataburger
2015 US average sales per unit: $2,530,000
US systemwide sales: $1.75 billion
2. Jason's Deli
2015 US average sales per unit: $2,664,000
US systemwide sales: $643.6 million
1. Chick-fil-A
2015 US average sales per unit: $3,977,300
US systemwide sales: $6.83 billion