Potatoes
10.0Neutral starch, works in any dish
Fried turnip batons crisp at 375°F oil within 4 minutes because their lower starch load (compared to potato) browns earlier but turns hollow if held past 6. Pat dry to prevent oil temperature crashing below 340°F when batches drop in. Substitutes on this page are evaluated against smoke-point compatibility with the oil bath, crust development before the interior overcooks, and oil absorption per gram measured after a 2-minute drain.
Neutral starch, works in any dish
Swap 1:1 by cup. Potato batons fry crisp in 6 minutes at 350°F (vs turnip's 4 at 375°F) because higher starch needs longer to gelatinize then dehydrate. Use a double-fry: 325°F for 4 minutes then 375°F for 2. Soak cut batons in cold water 20 minutes to leach surface starch and prevent sticking.
Sweeter, good mashed or roasted
Swap 1:1 by cup. Parsnip batons crisp fast — 3 minutes at 365°F — but their 9% sugars caramelize and burn if you push past 375°F. Cut to 3/8-inch thickness so the interior finishes before the edges blacken. Drain on a rack rather than paper to keep crispness past 2 minutes after frying.
Sweeter and softer, adjust cook time down
Swap 1:1 by cup. Sweet potato fries crave 325°F for 7 minutes — go higher and the sugars burn before the starch dehydrates. Cut to 1/4-inch matchsticks for crisp throughout, or 1/2-inch for crisp-outside-tender-inside. Coat in 1 teaspoon cornstarch per cup to compensate for soft surface and improve final crunch.
Peppery, great roasted as turnip sub
Swap 1:1 by cup. Sliced radish fries in 2 minutes at 375°F into chip-like discs. Their 95% water means heavy splattering — pat extremely dry then dust with 1 teaspoon cornstarch per cup. The peppery bite mellows within 90 seconds of contact with oil above 350°F, leaving a mild crisp savory note.
Mild root, good raw or cooked
Swap 1:1 by cup. Kohlrabi batons fry in 4 minutes at 365°F to a tempura-light crisp. Lower water (88%) means less oil-temperature crash when batches drop, so you can fry larger loads without losing the bath below 340°F. Peel the woody outer layer or strings render at the surface and burn.
Sweeter, similar dice size for stews
Swap 1:1 by cup. Carrot fries cook 5 minutes at 350°F. Their 6% sugars caramelize fast, so keep oil under 365°F or edges char before the interior softens. Cut on a bias to expose more surface area for crisping. Drain immediately; carrot fries soften quickly because of high sugar moisture absorption from steam.
Mild flavor, mash as turnip substitute
Swap 1:1 by cup. Cauliflower florets fry in 3 minutes at 350°F. Their hollow texture absorbs roughly 18% oil per gram (high), so blanch 2 minutes in salted water first to set the cell walls and limit absorption. Batter or dust with cornstarch for crust — bare florets brown unevenly across the curved surface.
Cube and roast, mild and slightly sweet
Mild root, mash with butter for similar body
Similar density, less sweet
Mild when cooked, slice thin for raw salads