
Cornstarch and flour-based thickeners often sneak rice derivatives or cross-processed starches into the mix, making it genuinely tricky to find a clean option for sauces and soups. Arrowroot starch is a naturally grain-free alternative that delivers a beautiful, glossy finish without any of those concerns. All it takes is two ingredients β arrowroot starch and cold water β whisked together into a smooth slurry before hitting your simmering pot. The technique is straightforward: stir it in while the liquid is at a gentle simmer, keep things moving, and pull it off the heat the moment it thickens to that perfect light coating consistency. The glossy result looks genuinely restaurant-quality and works across sauces, soups, and broths alike. One key tip worth remembering is that arrowroot doesn't love prolonged high heat, so removing the pan promptly is the secret to keeping that silky texture intact.
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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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