Season soup in three passes: aromatics in the fat at the start, dried herbs and seasoning blends in the middle while it simmers, and salt plus a splash of acid at the very end once the liquid has cooked down. Figure about a teaspoon of seasoning blend per quart of liquid, then taste and adjust after it has reduced. Most flat soup is not under-seasoned — it was seasoned all at once, into cold water, before anything had a chance to concentrate.
That last part is the whole trick: soup is the one dish where the amount of liquid changes while you cook. Season a gallon of broth that is about to become three quarts and you get warm water at hour one, a salt lick at hour three.
Pass one: bloom it in the fat
Before any liquid goes in, cook your onion, celery, carrot or garlic in butter or oil until they soften. Then add about half your dried seasoning and stir it in the hot fat for thirty seconds. You will smell it change.
Dried garlic, onion, paprika and most dried herbs give up their flavor to hot oil far more willingly than to water, so thirty seconds in the fat does more than twenty minutes of simmering. Keep the heat moderate — scorched garlic powder turns bitter.
Pass two: season the simmer
Liquid goes in, the rest of your blend goes in, and now you leave it alone. Whole spices and woody herbs — bay leaf, thyme, rosemary, peppercorns — want this long window, as does anything with dried onion or celery seed in it.
What does not belong here: salt, in any real quantity, and anything delicate. Fresh parsley, dill, basil and cilantro go in during the last two minutes or they turn to olive-drab confetti.
A rough measure for a 6-quart pot holding about 4 quarts of liquid: 4 teaspoons of blend total, half in the fat and half in the simmer. If that sounds like a lot, remember you are seasoning the liquid and everything floating in it. Our notes on how much seasoning to use per pound apply here too — season the whole weight of what is in the pot, not just the meat.
Pass three: salt and acid at the end
Taste the soup when it looks done, not before. Then two things, in this order.
Salt it. The pot has reduced, so you finally know how much liquid you are salting. Add a little, stir, wait thirty seconds, taste again. Tasting too fast is how people oversalt.
Then add acid. A squeeze of lemon, a splash of cider or red wine vinegar, a spoonful of pickle brine — half a teaspoon in a big pot. Almost nobody does this, and it is the difference between soup that tastes finished and soup that needs something you cannot name. If more salt is not fixing it, it wanted acid.
Three Flavor Seed blends, three pots of soup
The everyday base. The OG is our organic salt, pepper and garlic blend — the three things nearly every soup wants underneath whatever else it is doing. Potato, beef and barley, vegetable, bean. A teaspoon in the fat, a teaspoon in the simmer, and you have a floor to build on. USDA Certified Organic, no MSG, no fillers, no anti-caking agents, gluten free and kosher. A 5 oz resealable pouch is $13.49; there is also a 3.4 oz glass jar at $9.49.
For anything with a bird in it. Anything With Wings is our organic poultry blend — sea salt first, then organic garlic, coriander, onion, black pepper, cumin, basil, cayenne, oregano and ginger. Chicken noodle, chicken and rice, tortilla soup, turkey soup from Thursday's carcass. 5 oz pouch $13.49, 2.6 oz glass jar $9.49.
When you want the salt in your own hand. Zilch. Nada. None. is our organic all-purpose blend with no salt in it at all. Season both early passes generously, then salt once at the end when you know what you have — handy when you start from store-bought broth, which is salted already. 5 oz pouch $13.49, 1.9 oz glass jar $9.49.
Soup by type, in one line each
- Chicken soup. Poultry blend, bay leaf, plenty of black pepper, lemon at the end. Not oregano.
- Beef soup and stew. Salt, pepper, garlic plus thyme. Finish with vinegar, not lemon.
- Potato soup. Dairy mutes everything, so season heavier than you think. Garlic, pepper, chives on top — our loaded baked potato soup walks through it.
- Bean and vegetable soup. Salt beans only after they are tender; brown vegetables first.
Fixing a soup that is already bland
In order: lemon or vinegar; salt, a pinch at a time; a tablespoon of butter stirred in off the heat; a dried blend bloomed in butter in a separate pan, then stirred back in. That last one is the fix for "I forgot to season it at the start" — do not dump dry seasoning into finished soup, because it tastes dusty and sits on top. Slow cookers are their own version of this, since nothing browns and nothing reduces; we wrote about why slow cooker food tastes flat separately.
Frequently asked
When should you add seasoning to soup?
In two installments: half the dried seasoning in the hot fat with your aromatics, half when the liquid goes in. Salt, acid and fresh herbs wait until the end, after the pot has reduced and you can taste what you have.
How much seasoning do you put in a pot of soup?
About a teaspoon of blend per quart of liquid — roughly 4 teaspoons in a standard 6-quart pot — split between the two passes, then taste at the end. Soup is forgiving upward and unforgiving downward, so go light and build.
Why does my soup taste like nothing even though I added seasoning?
Three usual suspects. The seasoning went into cold liquid instead of hot fat, so it never bloomed. There is no acid in it. Or you salted early, the pot reduced, and now you are afraid to add more — add the acid first and taste again before reaching for the salt.
Come cook with us
We're a small, family-run company in Charlotte, North Carolina making USDA Certified Organic seasonings in small batches — no MSG, no fillers, no anti-caking agents. If you'd like our recipes in your inbox, you can join the Flavor Seed Kitchen and take 20% off your first order of $25 or more with code WELCOME20. Shipping is free over $25. No pressure either way — we're glad you're cooking.