
Thickening a sauce or soup without reaching for cornstarch or a citrus-spiked store-bought mix is easier than most people realize, and this two-ingredient slurry proves it. Arrowroot starch whisks into cold water in seconds, creating a silky, lump-free base that blends seamlessly into any simmering liquid. The result is a glossy, beautifully thickened sauce or broth that looks like it took real technique β because in a small way, it did. One thing to keep in mind: arrowroot is a little more delicate than other starches, so pulling the pan off the heat the moment your liquid reaches that perfect coating consistency is the key to keeping it smooth and glossy. For anyone navigating a citrus-free kitchen, this slurry is a genuinely useful building block, since it contains nothing but starch and water β no hidden additives, no flavored blends to scrutinize. Keep the ratio in your back pocket and you'll have a reliable thickener ready for weeknight gravies, hearty soups, and delicate pan sauces alike.
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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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