About Vinaigrette — vinaigrette ratio calculator
A vinaigrette is an emulsion of oil and vinegar, seasoned and held together just long enough to coat leaves, and its ratio is the single decision that shapes its character. The classic French ratio is three parts oil to one part vinegar, a balance that tastes rich without hiding the vinegar's brightness. But classic does not mean universal: a sharp sherry vinegar or lemon juice may want a gentler four-to-one ratio, while a mild rice vinegar or a sweet balsamic may shine at two-to-one. Vinaigrette, the calculator, starts from the vinegar you actually have, because vinegar is the flavour driver, and works out the oil and total yield from there, so scaling a dressing for two salads or twenty is arithmetic rather than guesswork.
The ratio also controls texture and coating. Oil carries flavour, gives body and helps dressing cling to leaves, while vinegar provides acidity, cuts richness and brightens the whole salad. Too much oil and the dressing feels greasy and heavy, pooling at the bottom of the bowl. Too much vinegar and it tastes harsh, wilts delicate leaves and overpowers subtle ingredients such as butter lettuce, fresh mozzarella or poached chicken. Bitter leaves like radicchio, endive and rocket can handle sharper dressings, while soft leaves and sweet ingredients such as roasted squash, strawberries and goat cheese prefer gentler ones. Taste is personal, so use the calculator to set a starting point, then adjust by a small amount and taste again.
Emulsification is the difference between a dressing that coats evenly and one that separates into oil and vinegar within seconds. Mustard is the home cook's best emulsifier: a teaspoon per sixty millilitres of vinegar, whisked in before the oil, helps tiny oil droplets stay suspended. Honey, egg yolk and finely grated garlic also help, though egg yolk turns the dressing into something closer to a mayonnaise and needs refrigeration care. Technique matters as much as ingredients: whisk the vinegar, salt, mustard and seasonings first until the salt dissolves, then drizzle the oil in slowly while whisking constantly, rather than pouring it all in at once. A jar with a tight lid and vigorous shaking works well too, and is the easiest method for larger batches.
Oil choice changes flavour more than many cooks expect. Extra-virgin olive oil brings grassy, peppery notes that suit Mediterranean salads, tomatoes and beans, but it can overpower delicate greens. Neutral oils such as grapeseed or sunflower let the vinegar and herbs lead, which suits Asian-inspired dressings and fruit salads. Nut oils, walnut or hazelnut, add a luxurious aroma to salads with cheese, pears and bitter leaves, but they are expensive and go rancid quickly, so buy small bottles and refrigerate them. Toasted sesame oil is a flavouring, not a base oil: use a small amount alongside a neutral oil, or it will dominate everything. Whatever oil you choose, taste it first, because a stale or bitter oil cannot be rescued by good vinegar.
Vinegar choice is equally wide, and each type brings its own acidity and character. Red wine vinegar is robust and suits hearty salads, white wine vinegar is lighter and suits fish and delicate greens, and sherry vinegar adds nutty depth to bean and mushroom salads. Balsamic vinegar is sweet and syrupy, so it needs less oil and less added sweetness, while apple cider vinegar brings a fruity tang that suits slaws and grain salads. Rice vinegar is mild and slightly sweet, ideal for gentle dressings, and lemon juice, though not a vinegar, follows the same ratio logic with a fresh, bright character. Check acidity on the label: most vinegars are about five percent acidity, but stronger vinegars need a gentler ratio or a little water.
Seasoning and additions turn a basic ratio into a signature dressing. Salt should go into the vinegar first, where it dissolves, rather than into finished oil, where it stays gritty. Freshly ground black pepper, a crushed garlic clove, a finely chopped shallot, fresh herbs, a pinch of sugar or a teaspoon of honey, and a little Dijon mustard each shift the balance, so add them one at a time and taste. Herbs should be added close to serving so they stay bright, while shallot and garlic benefit from ten minutes in vinegar, which softens their harsh edge. For a creamy variation, whisk in a spoonful of yoghurt, tahini or crème fraîche, and for a grain salad, add toasted seeds or nuts at the end for texture rather than blending them into the dressing.
Yield and storage are practical matters that the calculator handles directly. About thirty millilitres of dressing covers a large salad for two people, while one hundred and twenty millilitres covers four generous salads or a large grain bowl spread. Dressing without fresh garlic or egg keeps well in a sealed jar in the fridge for a week or two, though olive oil may solidify when cold; let it return to room temperature and shake well before use. Dressings with fresh herbs or garlic are best within three days, and egg-based dressings should be treated like mayonnaise and used promptly. Always shake or whisk before serving, because even a well-emulsified vinaigrette separates on standing, and that is normal, not a failure.
Worked examples show the arithmetic clearly. Thirty millilitres of vinegar at a three-to-one ratio needs ninety millilitres of oil and yields one hundred and twenty millilitres of dressing. Fifteen millilitres at two-to-one needs thirty millilitres of oil and yields forty-five millilitres, a sharp small batch for a single salad. Sixty millilitres at four-to-one needs two hundred and forty millilitres of oil and yields three hundred millilitres, a gentle large batch for a crowd. Enter your vinegar amount, choose a ratio that suits your vinegar and greens, add mustard and seasoning, and taste before you pour.
Once the basic ratio is comfortable, vinaigrette becomes a family of dressings rather than a single recipe, and each variation follows the same oil-and-acid logic with different flavours. A citrus vinaigrette replaces part or all of the vinegar with lemon, lime or orange juice, and because citrus is less acidic than vinegar, it often works best at a slightly sharper ratio, with a little extra salt to balance the fruit. A mustard vinaigrette increases the mustard to a tablespoon per sixty millilitres of vinegar, giving a thicker, more stable emulsion that clings to potatoes, green beans and grain salads. An Asian-inspired dressing uses rice vinegar, a neutral oil, a little sesame oil, soy sauce and grated ginger, and it suits noodle salads, slaws and grilled vegetables, though soy sauce adds salt, so season carefully. A balsamic dressing needs less added sweetness and often less oil, because balsamic is already sweet and syrupy, and it pairs beautifully with strawberries, tomatoes, mozzarella and roasted vegetables. A herb vinaigrette adds a large handful of soft herbs, blitzed or finely chopped, and it should be made close to serving so the herbs stay green and fresh, rather than oxidising to a dull colour. For a creamy dressing without mayonnaise, whisk in yoghurt, buttermilk or tahini, which add body and tang while keeping the dressing lighter than a cream-based one. Taste every variation with the actual salad it will dress, not from a spoon alone, because leaves, cheese, nuts and protein all change how sharp or rich a dressing feels, and a dressing that tastes perfect alone may taste harsh on bitter leaves or flat on a rich grain bowl.