There are some people who swear McDonald's sandwiches are the best, whether that's a beloved Big Mac or nostalgic standard cheeseburger, a crunchy Deluxe McCrispy chicken or the fan-favorite McRib.

If you've ever ordered McDonald's Filet-O-Fish, you may have noticed a slight difference in the bun compared to other McDonald's burgers. This is because the Filet-O-Fish uses a steamed bun, something ...