
Arrowroot starch is one of those quiet kitchen heroes that makes a huge difference once you start using it. For anyone avoiding wheat, thickening a sauce or soup can feel like a minefield β cornstarch works but can leave a chalky finish, and flour is obviously off the table entirely. Arrowroot delivers a beautifully glossy, clean result that lets the actual flavors of your dish shine through. The technique here is simple: whisk the starch with cold water first to create a smooth slurry, then stir it into your simmering liquid and watch it transform in under a minute. The most important thing to remember is to pull it off the heat promptly, since arrowroot breaks down if it boils too aggressively or sits at high heat for long. Two ingredients, one small bowl, and you've got a reliable thickener that works across soups, gravies, and sauces without a trace of gluten in sight.
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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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