
Thickening a sauce or soup sounds simple until you start reading labels on commercial thickeners and realize how many contain additives, preservatives, or synthetic compounds you'd rather avoid. This two-ingredient slurry keeps things completely clean β just arrowroot starch and cold water, nothing else. Arrowroot is a naturally derived starch that creates a beautifully glossy, silky finish in sauces, soups, and broths without any of the cloudiness you sometimes get from other thickeners. The technique is straightforward: whisk the starch into cold water first to prevent lumps, then stir it into your simmering liquid and watch it transform in under a minute. The one key rule is to pull the pot off the heat promptly, since arrowroot breaks down if it boils too aggressively or sits over high heat too long. Once you get the hang of it, this little slurry becomes an indispensable finishing move for everything from pan sauces to stews.
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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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