Homemade Tartare Sauce

A proper British chip-shop tartare sauce: cool, thick and sharp enough to cut through batter and hot fat. Everything is stirred together in one bowl in ten minutes, then rested so the vinegar and dill can bloom. It keeps for the best part of a week, so make it the night before your fish supper.

Jarred tartare sauce is sweet, loose and oddly beige. The chip-shop version is thicker, sharper and full of proper crunch, so it clings to hot battered fish instead of sliding off. It takes ten minutes and one bowl. The only real skill is squeezing the gherkins dry and giving the sauce time to sit before you serve it.

Ingredients

• 300g good full-fat mayonnaise — Hellmann's or similar; light mayo goes watery
• 80g cornichons or gherkins — drained and finely chopped
• 30g baby capers in brine — drained, roughly chopped
• 2 tbsp shallot or small onion — very finely diced
• 3 tbsp fresh dill — finely chopped
• 2 tbsp flat-leaf parsley — finely chopped
• 2 tsp English mustard — or 1 tbsp Dijon for a milder heat
• 1 tbsp malt vinegar — the chip-shop flavour; white wine vinegar for a softer version
• 1 tbsp lemon juice — plus finely grated zest of ½ lemon
• 2 tbsp soured cream or crème fraîche — optional, for a lighter, loosened finish
• ½ tsp caster sugar
• ¼ tsp fine sea salt — plus more to taste
• ½ tsp ground white pepper

Method

1. Drain the cornichons and capers well, then chop them finely — about the size of a match head. Tip them onto a double layer of kitchen paper, gather it up and squeeze firmly. You want them damp, not wet; this is what stops the finished sauce going runny in the fridge.
2. Finely dice the shallot, put it in a small bowl with the malt vinegar and lemon juice and leave to sit for 5 minutes. The acid takes the raw bite out of the onion and softens it so you get flavour without harshness.
3. Chop the dill and parsley finely, stems and all for the dill — the stalks carry a lot of the flavour and disappear into the sauce.
4. Spoon the mayonnaise into a mixing bowl and stir in the mustard, sugar, salt and white pepper until smooth and evenly coloured.
5. Add the squeezed gherkins and capers, the shallot along with all its soaking vinegar and lemon juice, the lemon zest and the chopped herbs. Fold everything through with a spatula rather than beating it — you want the sauce thick, not aerated.
6. Stir in the soured cream if using, a spoonful at a time, until the sauce just slumps off the spoon. It should hold a ridge for a second or two.
7. Taste and adjust: another splash of vinegar if it tastes flat, a pinch of salt if it tastes sweet, a little more lemon if it feels heavy. Chip-shop tartare should taste noticeably sharper than you think is right at room temperature.
8. Cover and chill for at least 30 minutes, ideally 2 hours. The sauce thickens, the dill perfumes the mayonnaise and the sharpness settles down. Stir once and taste again before serving.

Serve it with

• Beer-battered cod or haddock with chunky chips
• Scampi or breaded whitebait
• Fishcakes and a wedge of lemon
• Crispy halloumi or battered mushrooms for a meat-free supper
• Mushy peas and buttered white bread

Why this works

The takeaway trick is squeezing the chopped gherkins and capers dry before they go in, so their brine flavours the sauce without watering it down — the sauce stays thick enough to sit on a chip. Malt vinegar rather than white wine vinegar is the second half of it: it's the same sharpness you're already splashing on your chips, so the whole plate tastes of the same thing.

Common swaps

• No dill? Use all parsley plus a pinch of fennel seed, crushed — it gives a similar aniseed lift.
• Cornichons are worth buying, but a large deli gherkin, deseeded and squeezed hard, works fine.
• Swap capers for an extra 20g gherkin plus a splash of the caper or gherkin brine if you don't like their pungency.
• For a vegan version use a good plant-based mayo and skip the soured cream; add an extra teaspoon of lemon juice.
• Chopped pickled onions instead of shallot give a sharper, more old-school chippy flavour.

Common mistakes to avoid

• Not drying the pickles. Wet gherkins turn a thick sauce into a puddle within a day in the fridge.
• Using light or reduced-fat mayonnaise. It splits and thins once the acid goes in, and the sauce tastes hollow.
• Chopping everything in a food processor. It turns the gherkins to mush and whips air into the mayo — chop by hand for texture.
• Serving it straight away. Thirty minutes in the fridge is the difference between a bowl of ingredients and a sauce.

Storage, freezing & reheating

Storage: Keep in an airtight jar or tub in the fridge for up to 5 days. Press a little cling film onto the surface to stop it drying and picking up fridge smells. It may thicken and weep slightly — just stir it back together before serving.

Allergen notes: contains Egg, Mustard, Milk, Sulphites. Always check individual product labels.

Estimated nutrition

Per serving, estimated from typical ingredient values — not a substitute for precise dietary calculation.