01
Turnips
10.0best for soup1 cup : 1 cup
Mild root, works in stews and roasts
10.0
potatoes substitute
in soup.
Potatoes simmered in Soup adds body, flavor, and nutrition to every spoonful. The substitute should cook down at a similar rate and add comparable texture.
top substitutes
adjustment for this dish
Turnips don't break down the way potato does, so the broth won't thicken on its own — blend half the pot (not one-third) at minute 22 and stir back to build body. Turnip's peppery note deepens the aromatics; sauté an extra clove of garlic in the warm fat before stock goes in to balance and skim foam at minute 5 as usual.
02
Sweet Potato
10.0best for soup1 cup : 1 cup
Sweeter, works in most potato recipes
10.0
adjustment for this dish
Sweet potato breaks down faster than potato — simmer 18 minutes instead of 25, and blend only a quarter of the pot since it thickens the broth aggressively on its own. Its sweetness pairs with warming spices; add 1/2 tsp cumin at the sauté stage to deepen the aromatics rather than rely on bay alone, and finish warm with coconut cream instead of dairy cream.
03
Taro
10.0best for soup1 cup : 1 cup
Starchy and neutral, closest swap
10.0
adjustment for this dish
Taro's mucilage thickens the soup without blending — simmer 25 minutes and the broth reaches spoon-coating body naturally. Skip the blend-and-return step; just stir to redistribute the broken chunks. Taro pairs with coconut milk finishes; stir in 1/2 cup off heat at the end and season the second stage with fish sauce instead of extra salt for depth.
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04
Yam
10.01 cup : 1 cup
Neutral starch, less sweet
10.0
adjustment for this dish
Yam stays firm even after 30 minutes of simmer and won't thicken the broth through collapse. To get body, dice half the yam small (1/2 inch) to break down and leave half at 3/4 inch for texture, and blend one-third of the pot. Yam's lower sugar means the broth tastes savory-earthy; bump the bay to 2 leaves and skim foam at minute 5.
05
Parsnips
10.01 cup : 1 cup
Slightly sweet, mash or roast same as potato
10.0
adjustment for this dish
Parsnips sweeten as they simmer and balance a salty stock — cut the initial sauté salt from 1 tsp to 3/4 tsp since parsnip brings sweetness that reads as seasoned. Simmer 22 minutes, blend one-third and return, skim foam at minute 5. Parsnip's sweetness pairs with thyme-forward aromatics; add 2 sprigs at the sauté stage and pull at minute 20.
06
Breadfruit
10.01 cup : 1 cup
Starchy tropical fruit, roast or boil like potato
10.0
07
Cassava
10.01 cup : 1 cup
Starchy and neutral, closest swap
10.0
08
Cauliflower
6.71 cup : 1 cup
Low carb swap for mash and roasts
6.7
09
Kohlrabi
6.71 cup : 1 cup
Low carb swap, roast or mash when tender
6.7
10
Cornstarch
3.31 tbsp : 1 tbsp
Pure thickener; use 1 tbsp cornstarch slurry per potato to thicken soups, no bulk or texture
3.3
technique for soup
technique
Potato in soup is a dual-purpose workhorse — it thickens the broth through starch release and contributes body to every spoonful as it breaks down. Cut 3/4-inch chunks and add them after you sauté the aromatics so the surface toasts briefly in the fat before stock goes in; this builds 10-15% more depth than dropping raw potato into cold broth.
Simmer uncovered for 20-25 minutes until a piece crushes against the side of the pot with a spoon, then blend one-third of the contents and stir back in to thicken without flour. Season in two stages (half at the sauté, half after reduce) and skim the foam at minute 5.
Add bay at the start and pull it at 20 minutes. Unlike potato in meatloaf, which must hold its cube shape against the bind, soup potato is encouraged to collapse — collapse is the thickening mechanism.
Finish warm with a splash of cream off heat so it doesn't break.
pitfalls to avoid
watch out
Don't drop raw potato into cold stock; sauté the chunks briefly in the aromatics first to build 10-15% more depth through surface browning.
watch out
Avoid covering during the 20-25 minute simmer — a tight lid traps steam, prevents proper reduce, and the broth stays thin instead of thickening to body.
watch out
Skip blending every piece; blend only one-third of the pot and stir back so you keep texture and still get the silky thickener from broken starch.
watch out
Don't add cream while the soup is at a boil — off heat only, or the dairy will break and leave a grainy film on the warm surface.
watch out
Season in two stages at sauté and after reduce; single-stage seasoning leaves the potato interior flat while the broth tastes correctly salted.