Five ingredients, five minutes, and one rule: drain the relish and chill before serving. That’s the difference between a tartar sauce that actually tastes like Long John Silver’s and one that tastes like mayo with pickles in it. One bowl and a spoon is all you need — no blender, no food processor, no cooking.
What Makes It Taste Like Long John Silver’s
The defining character is sweetness. Long John Silver’s tartar is thick and clearly sweet, built for scooping alongside fried fish planks and hush puppies. The relish-to-acid ratio tips toward the sweet side, and the sugar is explicit rather than hidden. This is the version that ends up on Reddit every few months with people saying “I can’t figure out what’s in it” — and the answer is five ingredients.
The sweetness comes from two places working together: sweet pickle relish (not dill — dill produces a sharper, more traditional tartar) and a small amount of granulated sugar. Skip either one and you get a generic deli tartar, not the LJS sauce. A single teaspoon of lemon juice keeps it from reading as flatly sweet, and onion powder adds a savory base note without the texture of raw onion.
The One Technique That Actually Matters
Drain the relish before you mix it in. Most sweet pickle relish sits in brine, and spooning it straight from the jar adds liquid that dilutes the sauce and makes it run. A quick squeeze in a paper towel or 30 seconds in a small strainer removes that brine. What goes in should be relish, not relish water.
The second non-obvious thing: rest time. A freshly-made tartar sauce always tastes a bit flat or sharp — the individual ingredients haven’t had time to integrate. At 30 minutes in the fridge, the onion powder has hydrated into the mayo, the sugar has dissolved completely, and the lemon juice has rounded out. The sauce you taste at 30 minutes is genuinely different from the sauce you taste at 2 minutes.
Chasing the McDonald’s Filet-O-Fish Sauce Instead?
A lot of people land here searching for the McDonald’s tartar, and it’s worth being clear: it’s a related but different sauce. McDonald’s Filet-O-Fish tartar is built on dill pickle relish with a touch of added sugar, so it reads tangy-first with restrained sweetness, and it’s looser — made to spread thinly across a soft steamed bun rather than pool in a dipping cup. If that’s the flavor you’re after, follow the dedicated McDonald’s tartar sauce recipe. Same five-minute, one-bowl method; just dill relish and sugar in place of LJS’s sweet relish.
