How do I build savoury depth without meat?

Vegetarian dishes that taste thin are usually missing depth rather than salt. Depth comes from a small group of ingredients and two techniques, and both are easy to apply.

Step by step

1. Learn the umami ingredients.Dried and fresh mushrooms, tomato purée and sun-dried tomatoes, soy sauce, miso, marmite, nutritional yeast, parmesan or a vegetarian hard cheese, seaweed, and fermented things like kimchi.
2. Layer several rather than using one.The effect compounds. A little soy plus a little tomato purée plus mushrooms gives far more depth than a lot of any one, and none of them dominates.
3. Brown things properly first.Caramelisation and the Maillard reaction create savoury compounds that cannot be added later. Take the time to get real colour on onions, mushrooms and tomato purée.
4. Cook the tomato purée out.Fry it in the pan for a minute or two until it darkens before adding liquid. Raw purée tastes sharp and tinny; cooked it is deep and sweet. This is a genuinely large difference for no effort.
5. Use dried mushrooms and their liquid.Dried porcini soaked in hot water gives both a strong ingredient and a concentrated stock. The soaking liquid is the more valuable half.
6. Add miso or soy off the heat.Both are fermented and lose complexity with prolonged boiling. Stir them in near the end, and taste before adding salt, since both are salty.
7. Get colour on the onions.Not translucent — properly golden, which takes fifteen minutes rather than three. It is the single most common shortcut and the most costly.
8. Use a little acid at the end.Vinegar, lemon, tamarind. It lifts everything and makes savoury flavours read as brighter. A dish that tastes flat despite salt usually needs acid.
9. Add fat for carrying flavour.Olive oil, butter, tahini, coconut milk. Many flavour compounds are fat-soluble, so a fatless dish tastes thinner regardless of seasoning.
10. Toast spices and nuts.A dry pan until fragrant. It transforms them and adds a roasted depth that raw spices cannot provide.
11. Reduce rather than dilute.Let liquid cook down to concentrate what is in it. Adding more stock to a thin-tasting dish usually makes it thinner still.
12. Consider marmite or yeast extract.Half a teaspoon in a stew or a gravy. It is intensely savoury and, in small amounts, undetectable as itself.
13. Season in stages and taste.Salt at each stage rather than all at the end. Salt added during cooking does something different from salt stirred in at the table.

Tips

• Cook the tomato purée out in the pan before adding liquid. Biggest single improvement for the least effort.
• Layer three small umami sources rather than one large one. None dominates and the depth compounds.
• Flat despite enough salt usually means it needs acid, not more salt.

Common mistakes

• Rushing the onions — Properly browned onions are the base of the savoury depth in most dishes, and three minutes of softening does not produce it.
• Boiling miso or soy for a long time — Both are fermented and their complexity is degraded by prolonged heat. Add them near the end.

If it doesn't work