{"schema":"askedwell-answer-v1","url":"https://askedwell.com/pages/what-substitute-for/cornstarch","question":"What can I substitute for cornstarch?","short_answer":"Best 1:1 sub: arrowroot OR potato starch. For thickening sauces: 2 tbsp flour per 1 tbsp cornstarch (less translucent). For gluten-free: tapioca starch 1:1. For baking: 2 tbsp flour OR 2 tbsp arrowroot per 1 tbsp cornstarch.","long_answer":"**What cornstarch actually does**\n\nCornstarch is pure carbohydrate (no protein) used for thickening and texture. It's prized for: clear/glossy finish (vs flour's cloudiness), neutral flavor, 2× the thickening power of flour, works in gluten-free baking. Substitutes differ in thickening power, clarity, and how they behave under heat. There's no perfect universal sub.\n\n**For sauces, gravies, soups (thickening)**\n\n- **Arrowroot powder** — 1:1 sub. Clearer than cornstarch, slightly more powerful. Best for delicate sauces, fruit pies. AVOID with dairy (turns slimy).\n- **Potato starch** — 1:1 sub. Clear finish, very stable in cold storage, common in Asian cuisine. Don't overheat (loses thickening past 80°C).\n- **Tapioca starch (or pearl tapioca ground)** — 1:1 for sauces. Slightly chewy/elastic finish. Common in pie fillings, bubble tea.\n- **Flour** — use 2 tbsp flour per 1 tbsp cornstarch. Cloudier, less glossy, slower thickening (needs to cook to remove raw-flour taste, ~3+ min vs cornstarch's 30s). Most pantries have it.\n- **Rice flour** — 2 tbsp per 1 tbsp cornstarch. Gluten-free, mild taste. Common in Asian recipes.\n- **Xanthan gum** — 1/4 tsp per 1 tbsp cornstarch. EXTREMELY potent. Stir into liquid; lumps if added to hot.\n\n**For baking (cookies, cakes, custards)**\n\n- **Cake flour** can replace cornstarch + flour combination (e.g., for cake recipes)\n- **All-purpose flour** — 2 tbsp per 1 tbsp cornstarch in cookies + cakes; slightly denser texture\n- **Arrowroot** — 1:1 for delicate custards + puddings\n- **Tapioca starch** — 1:1 for fruit pies (gives slight chew)\n\n**For coating + frying (cornstarch is famous here)**\n\n- **Rice flour** — produces equally crispy crust (often crispier!)\n- **Potato starch** — very crispy + light texture\n- **Flour** — works but heavier, less crisp\n- **Combo: 1 part flour + 1 part rice flour** — closest to cornstarch coating\n\n**For meringue + soufflé**\n\n- **Cream of tartar (1/4 tsp per egg white)** — different mechanism but stabilizes whites the same way\n- **Arrowroot** — 1:1 in meringue cookies\n\n**Comparison table (thickening power per 1 tbsp)**\n\n| Starch | Power vs cornstarch | Clarity | Heat stable | Notes |\n|---|---|---|---|---|\n| Cornstarch | 1× (reference) | High | To 90°C | Pantry staple |\n| Arrowroot | 1.1× | Higher | To 80°C | Best clear-sauce sub |\n| Potato starch | 1× | Highest | To 80°C | Asian cooking |\n| Tapioca | 1× | High | To 95°C | Chewy finish |\n| Flour | 0.5× | Low/cloudy | Stable to 100°C+ | Most available |\n| Rice flour | 0.5× | Medium | Stable | GF coating king |\n| Xanthan gum | 4× | High | Very stable | Use sparingly! |\n\n**Cross-reference:** see /pages/what-substitute-for/buttermilk + /pages/what-substitute-for/eggs-in-baking for related substitution math.","ranges":[{"condition":"Sauces / gravies (1:1)","duration":"Arrowroot OR potato starch 1:1","note":"Closest match"},{"condition":"Pantry-only (use flour)","duration":"2 tbsp flour per 1 tbsp cornstarch","note":"Cloudy + slower"},{"condition":"Fruit pies (slight chew)","duration":"1:1 tapioca starch","note":"Asian markets carry it"},{"condition":"Gluten-free baking","duration":"1:1 rice flour OR tapioca","note":"Different texture"},{"condition":"Frying coating (crispy)","duration":"1:1 rice flour OR potato starch","note":"Often crispier than cornstarch"},{"condition":"Very thick / minimal-quantity","duration":"1/4 tsp xanthan gum per 1 tbsp cornstarch","note":"EXTREMELY potent"},{"condition":"Coating chicken/fish","duration":"50/50 rice flour + flour","note":"Crisp + structure"}],"variables":[{"name":"Use case (sauce vs coating vs baking)","effect":"Sauces → arrowroot/potato. Coating → rice flour. Baking → flour at 2× volume."},{"name":"Clarity desired","effect":"Clear gloss → arrowroot/potato. Doesn't matter → flour. Translucent → tapioca."},{"name":"Dairy in recipe","effect":"AVOID arrowroot with dairy (turns slimy). Use cornstarch, flour, or tapioca instead."},{"name":"Heat stability needed","effect":"Hot for long? Flour or tapioca. Brief high heat? Cornstarch, arrowroot, potato."},{"name":"Cooking time available","effect":"Quick (1-2 min) → cornstarch/arrowroot. Slow (5+ min) → flour to cook out raw taste."}],"sources":[{"label":"America's Test Kitchen Cook's Illustrated","note":"Starch comparison thickening + clarity tests"},{"label":"J. Kenji López-Alt, The Food Lab","note":"Frying-coating starch comparison"},{"label":"Harold McGee, On Food + Cooking","note":"Starch chemistry: amylose vs amylopectin behavior"},{"label":"King Arthur Baking gluten-free guide","url":"https://www.kingarthurbaking.com/learn/guides/gluten-free-baking","note":"GF starch substitutions tested"},{"label":"USDA FoodData Central","note":"Composition + thickening properties of starches"}],"faq":[{"question":"Can I substitute flour for cornstarch in pie filling?","answer":"Yes but the result differs. Use 2 tbsp flour per 1 tbsp cornstarch. The filling will be cloudier (not glossy-clear like cornstarch gives) and may take 5+ minutes simmering to fully cook the raw flour taste. Best alternative for pies: tapioca starch (1:1) — gives a slight chewy texture that's often preferred for fruit pies, especially berries. Or arrowroot (1:1) — clearest gloss but loses thickening if reheated multiple times."},{"question":"Why does my arrowroot sauce turn slimy with dairy?","answer":"Arrowroot interacts with the casein protein in dairy to create a slimy, ropy texture. This is a chemical reaction — not bad cooking. Solution: switch to cornstarch, tapioca starch, or flour for any dairy-containing sauce (béchamel, cheese sauce, cream gravy). Save arrowroot for: clear fruit sauces, Asian stir-fry glazes, custards using egg yolk thickening (no dairy needed), pan sauces from non-dairy stock."},{"question":"How much xanthan gum equals 1 tablespoon of cornstarch?","answer":"About 1/4 teaspoon xanthan gum per 1 tablespoon cornstarch. Xanthan is ~4× more potent than cornstarch as a thickener. CRITICAL: never add xanthan directly to hot liquid — it will clump immediately. Instead: pre-mix xanthan into a cool ingredient (oil, cold portion of the liquid, dry ingredients), then whisk into hot. Common in gluten-free baking and salad dressings. Too much xanthan = mucus-like texture; start with 1/8 tsp + add more."}],"keywords":["cornstarch substitute","replace cornstarch","arrowroot vs cornstarch","flour for cornstarch","gluten-free thickener"],"category":"baking","date_published":"2026-05-20","date_modified":"2026-05-20","license":"CC-BY-4.0","attribution":"https://askedwell.com"}