An Honest Vinaigrette: Oil, Acid, Salt
A vinaigrette is the simplest sauce in the kitchen and the one most often bought needlessly in a bottle. It is oil, acid and salt, balanced to taste — nothing more required. Because oil is the bulk of it, this is the dressing that most rewards a good extra virgin, and most exposes a bad one.
No sauce is quicker, cheaper or more rewarding to make yourself than a vinaigrette, and none is more pointlessly bought in a bottle. It is three things whisked to a balance you control — and because oil is three-quarters of it, a homemade vinaigrette with a good oil leaves any supermarket bottle standing. Learn it once and you are free of the bottle forever.
The ratio and the method
Start from the classic three-to-one: three parts oil to one part acid, then adjust to your taste. Put the acid — red or white wine vinegar, sherry vinegar, lemon — in a bowl with a good pinch of salt and whisk until the salt dissolves; salt dissolves in the acid, not the oil. Add a little Dijon mustard if you like, which helps it emulsify and adds depth. Then whisk in the extra virgin in a steady stream until it comes together, glossy and slightly thickened. Taste, and balance: too sharp, add oil; too flat, add acid or salt. That is the whole technique — seconds of work for something far better than any bottle.
Why the oil decides it
Since oil is three-quarters of a vinaigrette, its quality is the dressing’s quality. A fresh, fruity extra virgin gives a dressing with real character; a tired, flat or cut oil makes a greasy, dull one no amount of mustard will rescue. That said, match the oil to the job: a fierce, very peppery oil can overwhelm a delicate salad, where a milder oil sits better, while robust leaves and bitter greens welcome a bolder one. Make it fresh each time — it takes seconds — and dress the leaves at the last moment, lightly, so they glisten rather than drown. If you want to be sure your oil is what it claims, read up on extra virgin that isn’t.
Where salt goes wrong
Here is the small thing that quietly separates a good vinaigrette from a gritty one: salt dissolves in acid, not in oil. Whisk your salt into the vinegar or lemon first and let it disappear, and you get an even, rounded seasoning. Tip it into the finished emulsion at the end and it never fully dissolves — you get gritty crystals and uneven bite. It is a two-second habit that most people never learn, and it is the difference between a dressing that tastes seasoned and one that tastes salty in patches.
| Do | Instead of | Because |
|---|---|---|
| Dissolve salt in the acid first | Adding salt to the finished dressing | Salt dissolves in acid, not oil — or it stays gritty |
| Match a bold oil to sturdy leaves | One oil for every salad | A fierce oil overwhelms delicate lettuces |
| Add mustard to emulsify | Whisking oil and acid alone | Mustard binds it and adds depth |
| Make it fresh each time | A big batch that sits | It takes seconds and tastes far brighter fresh |
| Dress lightly, at the last minute | Drowning the leaves early | Leaves should glisten, not swim or wilt |
Match oil to salad
- For tender lettuces and delicate leaves, use a milder, fruity oil so you do not bury them.
- For bitter greens, tomatoes or robust salads, reach for a bolder, peppery extra virgin that can hold its own.
- Dissolve the salt in the acid before you whisk in the oil.
- Taste the finished vinaigrette on a leaf, not just off the spoon — it reads differently once it is coating something. Dress lightly and at the last minute.
An honest vinaigrette: common questions
What is the classic vinaigrette ratio?
Three parts oil to one part acid, then adjusted to taste — too sharp, add oil; too flat, add acid or salt.
Why won’t my salt dissolve in the dressing?
Because salt dissolves in acid, not oil. Whisk it into the vinegar or lemon first, before you add the oil, and it disperses evenly instead of staying gritty.
Do I need mustard in a vinaigrette?
Not strictly, but a little Dijon helps the dressing emulsify and stay together, and adds a welcome depth.
What olive oil is best for vinaigrette?
A fresh, fruity extra virgin, matched to the salad — milder for delicate leaves, bolder and peppery for bitter greens and robust salads. Oil is most of the dressing, so it decides its quality.
Can I make vinaigrette ahead?
You can, but it is best fresh — it takes only seconds. Dress the leaves at the last moment so they glisten rather than wilt.
For tender lettuces and delicate leaves, use a milder, fruity oil so you do not bury them ; for bitter greens, tomatoes or robust salads, reach for a bolder, peppery extra virgin that can hold its own. Dissolve the salt in the acid before the oil goes in, or it stays gritty. Always taste the finished vinaigrette on a leaf, not just off the spoon — it reads differently once it is coating something. Dress lightly and at the last minute.
Method from general home cooking; the classic vinaigrette ratio.