Salt, Acid And Seasoning A Dish

A dish that tastes dull is rarely missing an ingredient. It is missing an adjustment, and the two adjustments that do most of the work are salt and acid.

Salt changes how other flavours are detected

Salt suppresses bitterness and increases the perceived intensity of sweet and savoury notes, so adding it makes existing flavours more apparent rather than adding a salty one.

This is why an underseasoned soup tastes of nothing in particular. The components are present and the palate is not registering them clearly.

The effect has a ceiling. Past a certain point salt stops enhancing and starts dominating, and there is no way to reverse it beyond dilution.

When salt goes in matters as much as how much

Salt added early has time to diffuse into the food, seasoning it throughout rather than sitting on the surface. This is most obvious in braises, pulses and anything with a long cooking time.

On meat, salt applied well in advance draws moisture out and then back in carrying the salt with it, which seasons the interior and changes the texture of the protein.

Salt added at the end sits on the surface and hits the tongue directly, which is a different and sometimes desirable effect rather than a mistake.

Acid does the job people expect salt to do

Acid provides contrast. A rich dish tastes heavy because nothing is cutting through the fat, and a small amount of lemon or vinegar restores definition immediately.

The usual sign is a dish that tastes complete but somehow flat, where more salt makes it salty without making it better. That is an acid deficit rather than a salt one.

Acid also brightens sweetness, which is why fruit dishes and tomato sauces both improve with an addition that would seem to have nothing to do with them.

Fat and sweetness are the other two levers

Fat carries aroma compounds and spreads them across the palate, which is why a dish finished with butter or oil tastes fuller without any change to its seasoning.

A small amount of sweetness rounds off harsh edges, particularly in acidic sauces, and it works below the level at which anything tastes sweet.

These four levers interact, so an adjustment to one usually changes what the others need, which is the reason for tasting continuously rather than seasoning once.

Tasting properly

Taste at the temperature the dish will be eaten, since perception of salt and sweetness both change substantially between hot and cold.

Adjust one thing at a time and in small amounts, because two simultaneous changes make it impossible to know which one helped.

Palate fatigue is real over a long cooking session, so a second opinion, or a pause, is more useful than tasting the same spoonful repeatedly.