The 150-calorie bun, made with premium ingredients like quinoa and amaranth and lightly sweetened with molasses and raisins, is now available in restaurants nationwide, according to a company news release.
It comes individually packaged and can be ordered with any Chick-fil-A sandwich for an additional $1.15.
The company tested the option in three U.S. cities in 2016 and found the bun to be the most commonly ordered item with the grilled chicken sandwich and grilled chicken deluxe sandwich.
“Our hope is that the gluten-free bun addition opens up options for gluten-sensitive customers to enjoy more of our menu, Leslie Neslage, senior consultant of menu development at Chick-fil-A, said.
Gluten-free items are most commonly consumed by people with celiac disease, an autoimmune disorder in which the body mistakenly reacts to gluten, a protein found in wheat, barley and rye, as if it were a poison.