Knowledge base
Soup questions, answered.
The questions readers ask the most often. Updated whenever a question shows up three times in our inbox.
12 questions 4 categories May 2026
the foundation
Stock & broth
Stock is the master variable in soup. Here is what we have learned building it across hundreds of pots.
- Stock is simmered from bones and runs richer and more gelatinous; broth is simmered from meat and vegetables and runs lighter and more seasoned. For most soups a good stock gives more body. Bone broth is simply stock simmered much longer, often with roasted bones.
- Yes, for weeknight soups. Buy low-sodium so you control the salt, and pick one brand you trust. When a recipe leans entirely on the broth (French onion, pho, chicken noodle), homemade or a long-simmered bone broth is worth the time.
the pot itself
Technique
Why a soup tastes flat, how to thicken it, and how to keep cream from breaking.
- Usually under-salted, or missing acid. Salt in layers as you go, not just at the end. Then add a small splash of acid, lemon juice or vinegar, right before serving; it lifts everything. Browning the aromatics and meat first also builds the savory depth a pale pot is missing.
- Four reliable ways: blend a cup of the soup and stir it back in; simmer uncovered to reduce; stir in a slurry of cornstarch and cold water; or make a roux of butter and flour at the start. For creamy soups, a starchy potato blended in thickens without dairy.
- Take the pot off the boil before adding dairy; a hard boil splits cream and cheese. Temper it first by stirring a ladle of hot soup into the cream, then add it back. Full-fat cream is far more stable than milk or low-fat.
- Do not just add water, it thins the flavour along with the salt. Add unsalted bulk instead: more low-sodium stock, a peeled raw potato simmered in for fifteen minutes and then removed, or extra vegetables. A splash of acid or a spoonful of cream also masks perceived saltiness. Next time, salt in layers so it never gets here.
make-ahead
Storage & freezing
How long soup keeps, what freezes well, and what does not.
- Brothy, bean, and vegetable soups freeze excellently for up to three months. Cream-based soups and chowders can separate when thawed; freeze them before the dairy goes in, then finish with cream when you reheat. Pasta and rice go mushy frozen, so add them fresh at serving.
- Three to four days in an airtight container. Cool it quickly, within two hours, before refrigerating. Reheat to a full simmer before serving. Soups with seafood are best eaten within two days.
- Freeze in single or family portions so you only thaw what you need. Rigid containers or sturdy freezer bags laid flat both work; leave an inch of headspace because soup expands as it freezes. Label with the date. Wide-mouth jars are fine, but narrow-neck glass can crack.
real-world cooking
Swaps & substitutions
What works, what does not, and what we have stopped trying.
- Yes. Blend in a cooked potato or a cup of white beans for body, or use full-fat coconut milk for a dairy-free finish. Evaporated milk is more stable than cream and lighter. A blended cauliflower also turns a soup velvety with no dairy at all.
- Most vegetable, bean, and lentil soups are vegetarian as written or with a vegetable stock swap. For brothy soups, a good vegetable stock plus a parmesan rind, miso, or soy sauce rebuilds the savory depth the meat would have given.
- Yes, it is the best shortcut in this kitchen for any soup built on cooked shredded chicken: chicken noodle, tortilla, chicken and rice. Add the meat near the end, just to heat through, or it turns stringy. And keep the carcass: simmer it an hour with an onion and a carrot for a fast, real stock.
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