
Thickening a sauce or soup sounds simple until you start reading the labels on commercial thickeners and gravy packets, which can hide a surprising number of additives and synthetic dyes. Arrowroot starch is a clean, single-ingredient alternative that does the job beautifully without any of that baggage. Just two ingredients β arrowroot starch and cold water β come together in seconds to create a smooth slurry that transforms any simmering liquid into something glossy and perfectly coated. The technique is straightforward: whisk, stir, pour, and you're done in under a minute. One thing worth knowing is that arrowroot is a little more delicate than cornstarch β you want to pull the pot off the heat as soon as the liquid thickens, since prolonged boiling will break down its power. The result is a light, silky consistency that works beautifully in sauces, soups, and broths without clouding or dulling the color of your dish. Once you have this slurry in your back pocket, reaching for a dye-laden packet from the pantry becomes a thing of the past.
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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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