Four ingredients and thirty minutes in the fridge. That is the entire McDonald’s tartar sauce recipe — and the thirty minutes is non-negotiable.
The sauce goes on every Filet-O-Fish McDonald’s has sold since 1962: a thin, even spread on the bottom bun that you can’t really buy at the counter and can’t replicate with a generic jarred tartar — but can reliably recreate at home with a bowl and a spoon.
The One Thing Most Copycat Recipes Get Wrong
Most McDonald’s tartar sauce recipes call for sweet pickle relish. The McDonald’s version uses dill pickle relish, with a small amount of added sugar to create the characteristic mild sweetness.
The difference matters because it changes the flavor profile:
- Sweet relish version: candied, jammy sweetness, noticeably sweet on first bite
- Dill relish + sugar version: tangy front with restrained sweetness behind it; the dill flavor comes through clearly
McDonald’s tartar sauce tastes tangy-first, sweet-second. That balance only comes from the dill version. Use sweet relish and you get a sauce that’s sweet-first and loses the pickled sharpness that makes the Filet-O-Fish work.
One honest caveat: McDonald’s commercial relish is itself lightly sweetened (the ingredient panel lists corn syrup), and the sauce contains a little distilled vinegar, so the real thing lands tangy-sweet rather than bone-dry. The dill-relish-plus-sugar build gets you there cleanly. If your batch tastes a touch flat, a few drops of white vinegar is a faithful tweak — it’s doing the same job the commercial vinegar does.
If you only have sweet relish, cut the added sugar in half. If you have neither, finely chop any whole kosher dill pickle — about two tablespoons — and use that instead.
Why Draining the Relish Is Not Optional
Jarred pickle relish sits in brine. A tablespoon of undrained relish adds a noticeable amount of liquid to the sauce and dilutes the mayo base. For a half-cup batch, that extra brine shows up as a thin, slightly watery texture that never quite thickens properly even after resting.
Drain it first. A paper towel squeeze takes 15 seconds and removes enough liquid that the sauce comes together with the right creamy body. You’ll see the liquid come out — more than you’d expect.
How to Use It Beyond the Filet-O-Fish
The sauce is versatile enough to replace most standard tartar applications:
- Fish sandwiches and po’boys — the obvious use; it spreads cleanly on buns without overloading the fish
- Fish tacos — stir it into shredded cabbage for a fast slaw-sauce hybrid, or use it straight as the drizzle
- Crab cakes — the mild sweetness complements crab without competing the way a strongly acidic tartar does
- Fish sticks — the way nature intended them to be eaten
- Fried shrimp or calamari — when you want something gentler than cocktail sauce
- BLTs — the dill-and-mayo combination works surprisingly well against crispy bacon
For a comparison with the sweeter Long John Silver’s version — which is thicker, dip-style, and built from sweet relish — see the Long John Silver’s tartar sauce recipe. Same pantry, different balance targets.
