Best Substitutes for Cornflour
Cornflour creates smooth, glossy sauces and gives fried foods that crispy shell. It thickens liquids at 212F and stays clear when cooked, unlike wheat flour which turns cloudy. A single tablespoon thickens 1 cup of liquid to a light coating consistency. Cornflour has zero gluten and breaks down if boiled too long or stirred aggressively. When substituting, you need something that thickens at similar temperatures and won't turn your clear sauce into paste. The best subs match cornflour's fine texture and neutral flavor.
Best Overall Substitute
Potato starch at a 1:1 ratio. It thickens at the same temperature as cornflour, stays crystal clear when cooked, and handles acidic ingredients without breaking down. Works perfectly for glazes, gravies, and coating fried foods.
All Substitutes
Potato starch
1:1 by weightPotato starch thickens at 150-160F, slightly lower than cornflour's 185F activation point. It creates an even clearer, more glossy finish than cornflour. The texture stays stable in acidic sauces and doesn't break down when reheated. For coating, it gives an incredibly crispy crust that stays crunchy longer. Mix with cold liquid first to prevent lumps, just like cornflour.
Arrowroot powder
1:1 by weightArrowroot activates at 158F and creates a beautiful clear, glossy finish. It's more delicate than cornflour and breaks down if boiled hard or stirred too much once thickened. Works best added in the last 2-3 minutes of cooking. The thickening power drops in acidic liquids (below pH 4), so add extra when working with tomatoes or citrus. Perfect for delicate sauces that need gentle handling.
Cornstarch
1:1 by weightCornstarch is literally the same thing as cornflour (different names, same product). In the US, it's called cornstarch. In the UK and Australia, it's cornflour. Both are pure corn starch with identical thickening power. If you have cornstarch, you have cornflour. Thickens at 185F and creates glossy, clear sauces. Mix with cold liquid before adding to hot mixtures to prevent clumping.
Tapioca starch
1:1 by weightTapioca starch thickens at 140F, earlier than cornflour, and creates a slightly stringy but clear texture. It handles freezing and thawing better than most starches without separating. The gel strength is high, so sauces stay thick even when cooled. Has a neutral taste and works in acidic conditions. Creates chewier textures in baked goods, which can be desirable in some applications.
Rice flour
1.5:1 (use 1.5 tbsp rice flour for 1 tbsp cornflour)Rice flour has weaker thickening power than cornflour, so you need 50% more. It creates a slightly cloudy, matte finish instead of cornflour's glossy look. Thickens gradually and doesn't form lumps as easily. The texture is grainier unless you use super-fine rice flour. Works best when mixed into a slurry with cold liquid. Handles long cooking times without breaking down.
Wheat flour
2:1 (use 2 tbsp flour for 1 tbsp cornflour)All-purpose flour has half the thickening power of cornflour, so double the amount. It creates opaque, matte sauces instead of clear ones. Needs cooking for 2-3 minutes to eliminate the raw flour taste. Works best when made into a roux (cooked with fat) for gravies and sauces. The gluten gives body but makes everything cloudy. Takes longer to thicken than cornflour.
Instant mashed potato flakes
1:2 (use 1/2 tbsp flakes for 1 tbsp cornflour)Potato flakes absorb liquid instantly and thicken fast. Use half the amount you'd use of cornflour. They add a subtle potato flavor and create a slightly cloudy, creamy texture. Work best in savory applications like gravies and stews. Don't mix directly into hot liquid or they'll clump. Whisk into cold liquid first, then add to the hot mixture while stirring constantly.
Ground flax seeds
1:1 by weight, but let it sitGround flax mixed with liquid creates a gel-like consistency after 15 minutes. It doesn't thicken during cooking like cornflour but works as a binding agent. Adds nutty flavor and brown color. Contains fiber and omega-3s. Works best in applications where the nutty taste complements the dish. The texture is different from cornflour's smooth finish but provides similar binding power in baked goods.
How to Adjust Your Recipe
Always mix starch substitutes with cold liquid before adding to hot mixtures to prevent lumps. When using weaker thickeners like rice flour, start with the full substitute amount and add more gradually until you reach the right consistency. Most starches thicken more as they cool, so don't over-thicken hot liquids. For coating foods before frying, pat ingredients dry first since moisture prevents crispy results. When thickening acidic sauces, add extra arrowroot or use potato starch which handles acid better.
When Not to Substitute
Don't substitute when making traditional Asian dishes that specifically call for cornflour's texture and appearance. Recipes like Chinese velvet chicken or crystal dumplings rely on cornflour's unique properties. Avoid subs in commercial food production where consistency matters for shelf life. Professional pastry recipes often specify cornflour for precise texture control that other starches can't match exactly.
Frequently Asked Questions
Can I use regular flour instead of cornflour for coating fried chicken?
Yes, but use 2 tablespoons of flour for every 1 tablespoon of cornflour. The coating won't be as crispy and will have a heavier, breadier texture. Season the flour well since it has less concentrated flavor than cornflour. Expect a golden brown color instead of the lighter, crispier coating cornflour provides.
How much arrowroot powder replaces 2 tablespoons of cornflour in fruit pie?
Use 2 tablespoons of arrowroot powder for 2 tablespoons of cornflour in most fruit pies. For very juicy fruits like fresh peaches or berries, use 2.5 tablespoons since arrowroot is slightly less effective with high-acid fruits. Add the arrowroot to your fruit mixture 10 minutes before baking for best results.
What happens if I use potato starch instead of cornflour in stir-fry?
Potato starch works perfectly in stir-fries at a 1:1 ratio. It actually creates a glossier, more restaurant-style coating on meats and vegetables. The sauce will be slightly thicker and more clingy than with cornflour. Mix 1 tablespoon potato starch with 2 tablespoons cold water for every tablespoon of cornflour the recipe calls for.
Can tapioca starch replace cornflour in gluten-free baking?
Yes, tapioca starch substitutes directly at 1:1 ratios in most gluten-free baking. It provides better binding than cornflour and creates chewier textures in cookies and breads. For cakes, use 3/4 the amount of tapioca starch since it's slightly stronger. The finished products will have more elasticity and hold together better than with cornflour alone.
How do I fix lumpy gravy when I don't have cornflour?
Mix 2 tablespoons all-purpose flour with 3 tablespoons cold water until smooth. Whisk this slurry into 1 cup of hot gravy gradually while stirring constantly. Simmer for 3-4 minutes to cook out the flour taste. For every tablespoon of cornflour your recipe needed, use 2 tablespoons of flour in this method.