Best Filet-O-Fish Ordering Hacks Swap the Sauce We saw this one on TikTok, where fast food hacks pop up frequently. If you don't like tartar sauce, you can ask for Big Mac sauce, instead.

The McDonald's Filet-O-Fish, introduced in the 1960s, features a breaded, fried fish fillet, usually made from white fish like pollock, served on a soft steamed bun. The sandwich is topped with tartar ...