6 Fast-Food Chains That Use Frozen Burgers Sometimes, even the big fast-food chains cheat. According to Eat This, Not That, many fast-food chains use frozen burger patties. These chains include: Burger King, Carl's Jr., Dairy Queen, Jack in the Box, McDonald's, Some Wendy's locations Do you care if these places are using frozen patties? Which of these places has the best burgers? Are there any other fast-food places that make better burgers than these chains?