What a great find! I stumbled upon Burger 21 when I saw a Facebook post that they were donating 10% of their sales that day to the Charlotte Celiac Connection. I had an awesome Philly Burger, fries, and a peanut butter chocolate shake - all gluten free and so tasty. The bun was excellent; not small or crumbly, in fact it seemed like a normal bun! They get them from a local bakery. Needless to say, we went back a week later!