Best Substitutes for Cornstarch

Arrowroot thickens at 158F, much lower than cornstarch's 203F, so it works in delicate sauces that can't handle high heat. It creates an identical clear, glossy finish and handles acidic ingredients like lemon juice and wine better. The thickening power matches cornstarch exactly. Mix it with cold liquid first to prevent lumps, just like cornstarch. It stays stable when frozen and reheated, unlike cornstarch which turns watery.

Tapioca starch creates a slightly more elastic, stretchy texture than cornstarch but thickens at the same temperature (203F). It holds up better to freezing and reheating cycles. The final result is crystal clear with a subtle sheen. It handles acidic ingredients well and doesn't break down as quickly under high heat. Some recipes actually benefit from the slight chewiness it adds, especially in fruit fillings for pies.

Potato starch has the strongest thickening power of all starches, so it works at lower concentrations but the 1:1 ratio is still safe. It activates at 149F, even lower than arrowroot. The texture is smooth and neutral with no flavor. It tolerates higher temperatures better than cornstarch without breaking down. Perfect for last-minute thickening because it works almost instantly when stirred into hot liquids.

Flour has about half the thickening power of cornstarch because it's only 70% starch (the rest is protein and other compounds). It needs to cook for 2-3 minutes to eliminate the raw flour taste. The result is slightly cloudy instead of clear, and it has a more substantial, less slippery mouthfeel. Cook it with fat first (make a roux) or whisk it with cold liquid before adding to hot mixtures to prevent lumps.

Rice flour thickens similarly to cornstarch but creates a slightly grittier texture if not mixed properly. It works best when whisked into cold liquid first, then heated gradually. The final result is nearly as clear as cornstarch with a neutral flavor. It handles acidic ingredients well and doesn't break down under moderate heat. Sweet rice flour (glutinous rice flour) works even better than regular rice flour for thickening.

Potato flakes absorb liquid instantly and thicken without cooking. They add a subtle potato flavor that works well in hearty dishes. The texture is less smooth than cornstarch but more substantial. Add them gradually while stirring to control thickness. They don't create the glossy finish of cornstarch but work perfectly for rustic gravies and stews where a homestyle texture is desired.

Ground flaxseed creates a gel-like consistency when mixed with liquid, but it takes 10-15 minutes to fully activate. It adds a nutty flavor and changes the color to brown or gray. The thickening happens through soluble fiber, not starch, so it works at room temperature. Best used in recipes where the flavor and color change are acceptable or desirable.

Unflavored gelatin creates a completely different texture than cornstarch but works for thickening in specific applications. Sprinkle it over 1/4 cup cold liquid and let it bloom for 5 minutes, then heat to dissolve. It sets as it cools rather than thickening when heated. The result is firm and jiggly rather than smooth and flowing. Only works in recipes that will be served cool or at room temperature.