Cooking
Substitute for Onion
Out of onions? 1 tbsp onion powder replaces a medium onion in sauces and soups; shallots, leeks or scallions swap 1:1 by volume where texture matters.
- vegetarian
- vegan
- gluten free
Quick answer
Out of onion? The most versatile swaps:
- 1
Onion powder
1 tbsp per medium onion
- 2
Instant minced (dried) onion
1 tbsp per ¼ cup chopped onion
- 3
Shallots
1:1 by volume, chopped
Onion supplies more than flavor. Cooked slowly, its sugars brown into sweetness and its water helps loosen a sauce; chopped raw, it adds crunch and a sharp sulfur bite. A swap that copies only the flavor works in soups and seasonings, but in a sauté base or a salad you also need something with the same bulk.
Cooking
For chili, soups, stews, meatloaf and casseroles, onion powder is the quickest swap. Its 1 tablespoon per medium onion comes from both a university extension chart and McCormick’s own conversion, but it gives no body, so a stew may look thinner than intended. Instant minced onion fills that gap partly; the University of Nebraska-Lincoln Extension equates 1 tablespoon to a small onion or ¼ cup chopped.
When the onion is the base of a sauté (the first step of a ragù, curry or risotto), use a fresh vegetable. Shallots cook the same way and give the most onion-like result. Leeks suit cream soups and gentle braises. Fennel works in Italian and Provençal dishes, where its anise note already belongs.
Raw dishes
Salsas, guacamole, burgers, slaws and salads need crunch. Scallions give the closest texture with less heat; shallots, sliced paper-thin, give a more refined bite in dressings. Instant minced onion stirred into a sour cream dip softens after 20 minutes in the fridge and is the classic choice for that dip.
When not to substitute
French onion soup, caramelized onion tarts, onion rings, bhajis and soubise sauce are made of onion. Powder, leeks or scallions produce a different dish. Even shallots behave differently: they cost more per cup and caramelize faster, so watch the pan if you use them.
Common mistakes
- Adding onion powder to hot oil. It burns in seconds and turns bitter; add it with liquid or to a dry rub.
- Using powder where the onion carried moisture. Sauces come out thick and tight unless you add liquid.
- Browning leeks at onion heat. They scorch and turn bitter before they soften.
- Cooking scallion greens from the start. They go gray and stringy; save them for the end.
All 6 substitutes at a glance
| Substitute | Ratio | Best for | Notes |
|---|---|---|---|
| Onion powder CookingRaw & finishing | 1 tbsp per medium onion | soups, chili, meatloaf, dips and dry rubs | Flavor only: no bulk, moisture or sweetness from browning. Add an extra 2 to 3 tbsp of liquid to a sauce that relied on the onion's water, and stir the powder into liquid rather than hot fat. |
| Instant minced (dried) onion CookingRaw & finishing | 1 tbsp per ¼ cup chopped onion | casseroles, burgers, sour cream dip, stuffing | Rehydrates into soft pieces, so it gives some texture that powder can't. Soak it in an equal volume of water for 5 minutes, or add it to a dish with enough liquid to absorb. |
| Shallots CookingRaw & finishing | 1:1 by volume, chopped | pan sauces, risotto, salsas, quick pickles | Finer-textured and sweeter with a slight garlic edge. They cook faster than onion and scorch sooner, so lower the heat a little. |
| Leeks (white and pale green) Cooking | 1:1 by volume, sliced | potato soup, braises, quiche, stock | Milder and sweeter; they melt rather than brown. Grit hides between the layers, so slice first, then rinse in a bowl of water and lift them out. |
| Scallions Raw & finishingCooking | 1:1 by volume, whites and greens | stir-fries, salads, fried rice, tacos | Less sulfur heat than raw onion and almost no sweetness when cooked. Add the greens in the last minute so they stay bright. |
| Fennel bulb Cooking | 1:1 by volume, chopped | soffritto, fish stews, tomato sauce, roasts | Gives similar bulk and sweetness when sweated, with a light anise note and no allium bite. Useful for people who avoid onion. |
Substitute calculator
How much onion does your recipe call for?
- Onion powder1 tbsp per medium onion
- Instant minced (dried) onion¼ cup instant minced onion
- Shallots1 cup chopped shallots
- Leeks (white and pale green)1 cup sliced leeks
- Scallions1 cup sliced scallions
- Fennel bulb1 cup chopped fennel bulb
Amounts are rounded to practical kitchen measures. Swaps without a fixed ratio, or that can't be measured in the unit you picked, show their ratio instead.
Frequently asked questions
How much onion powder equals one onion?
McCormick and Mississippi State University Extension both give 1 tablespoon of onion powder for one medium onion. For half an onion or a small one, start with 1½ to 2 teaspoons and add more once the dish has simmered a few minutes.
Can I use red onion instead of yellow onion?
Yes, one for one. Red onion is a little sharper raw and turns a muddy purple-gray when cooked a long time, so it suits salsas, salads and quick sautés better than pale cream soups.
How do I make raw onion less harsh?
Slice it, then soak the slices in ice water for 10 minutes or toss them with a little vinegar and salt. Both pull out some of the sulfur compounds that form when the onion is cut and soften the bite.
What gives onion flavor without onion?
For a cooked base, sweat chopped fennel and celery together, then add a pinch of asafoetida bloomed in oil for the savory allium note. Chives and scallion greens are mild options for raw dishes.
Sources
- Ingredient Substitutions, University of Nebraska-Lincoln Extension
- Ingredient Substitutions and Equivalents, Mississippi State University Extension
- McCormick Culinary Onion Powder, McCormick
More cooking substitutes
Substitute for Garlic
No fresh garlic? Use ⅛ tsp garlic powder or ¼ tsp granulated garlic per clove, or 1 tsp jarred minced. Shallot or asafoetida suit garlic-free cooking.
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Substitute for Chives
No chives? Thinly sliced scallion greens swap 1:1, frozen chives work in cooked eggs and sauces, and a little minced shallot suits dressings and dips.
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Substitute for Salt
Swapping salts? 1 tsp table salt equals about 2¼ tsp Diamond Crystal kosher, 1¼ tsp Morton kosher or 1 tsp fine sea salt. Weigh it (6 g) when it matters.
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Substitute for Allspice
No allspice? Mix ½ tsp cinnamon with ½ tsp ground cloves for each teaspoon, soften it with nutmeg for cakes, or use cloves alone at a quarter in savory rubs.
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