From an interview with Three Squares author Abigail Carroll:
Are there any dishes or foods that you would classify as typically, or even exclusively, “American?”
A number of iconic foods—hot dogs and hamburgers, snack food—are hand-held. They’re novelties associated with entertainment. These are the kinds of food you eat at the ballpark, buy at a fair and eventually eat in your home. I think that there is a pattern there of iconic foods being quick and hand-held that speaks to the pace of American life, and also speaks to freedom. You’re free from the injunctions of Victorian manners and having to eat with a fork and knife and hold them properly, sit at the table and sit up straight and have your napkin properly placed. These foods shirk all that. There’s a sense of independence and a celebration of childhood in some of those foods, and we value that informality, the freedom and the fun that is associated with them.