Substitute for Cornstarch
Arrowroot powder works 1:1 and is the cleanest substitute. All-purpose flour thickens too but you need twice as much, and it can leave a slight raw flour taste if not cooked long enough. Tapioca starch is another 1:1 swap that gives a slightly glossier, more elastic finish.
Best Cornstarch Substitutes
- Arrowroot powder used 1:1
- All-purpose flour used 2:1
- Tapioca starch used 1:1
Cornstarch thickens sauces and gravies. These alternatives create similar texture in cooking.
Why it works
All of these starches thicken sauces the same way: they absorb liquid and swell when heated, which is what makes a sauce go from watery to glossy and coating. Arrowroot works at lower temperatures and stays clear. Flour thickens more opaquely and needs longer cooking to lose the starchy taste. Tapioca has a bit more stretch, which some people notice in pie fillings.
Common mistakes
- Adding flour directly to a hot liquid without mixing it with cold water first. It clumps immediately.
- Using arrowroot in a dairy-based sauce. It turns slimy and stringy when cooked with cream or milk.
- Not cooking a flour-thickened sauce long enough. You can taste the starchiness if you rush it.
Real examples
- Stir-fry sauce that needs to coat and cling: arrowroot powder gives you a glossy, restaurant-style finish.
- Fruit pie filling: tapioca starch is the better call since it thickens cleanly without turning cloudy.