Cornstarch is one of those pantry staples that quietly shows up everywhere — thickening gravies, sauces, and soups — but for anyone avoiding corn, it's a constant obstacle. Arrowroot starch steps in as a seamless swap, delivering that same glossy, silky finish without any corn-derived ingredients. The technique here is straightforward: whisk the starch with cold water first to create a lump-free slurry, then stir it into your simmering liquid for just 30 to 60 seconds until everything turns beautifully glossy and coats the back of a spoon. One thing worth knowing is that arrowroot is sensitive to high heat, so pulling the pan off the burner at the right moment is the key to getting that perfect consistency every time. With only two ingredients and a single small bowl to wash, this is the kind of kitchen trick that quietly solves a big problem. Once you have this method down, thickening any sauce or broth on a corn-free diet becomes completely effortless.
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Combine the arrowroot starch and cold water in a small bowl and whisk or stir with a fork until completely smooth with no lumps remaining.
Bring the liquid you want to thicken (sauce, soup, or broth) to a gentle simmer in a saucepan over medium heat.
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