Charleigh Matice found this on her bun in McDonald's in Morehead City, North Carolina.
She told WCTI 12 she was particularly offended because her grandfather fought in World War II.
McDonald's has apologised and said an employee had been fired as a result. In a statement to WCTI 12 the company said:
"We are very sorry for the service that our customers received, and to be clear we have terminated the employee who was involved. We do not tolerate that kind of behavior at McDonald's, and it's not what we stand for personally as owners. It is about providing the best level of service and care to our customers, and anything less than that is unacceptable to us."