
Cornstarch is off the table when you're eating grain-free, and that's exactly where arrowroot starch steps in as the perfect swap. This simple two-ingredient slurry transforms any sauce, soup, or broth into something silky and glossy without relying on anything processed or grain-derived. The technique is straightforward β whisk the starch into cold water first to prevent clumping, then stir it into your simmering liquid and watch it thicken in under a minute. One thing worth knowing: arrowroot is sensitive to high heat, so pulling the pan off the burner promptly is the key to keeping that beautiful, light coating consistency. It's a small but mighty kitchen trick that makes finishing a pan sauce or tightening up a braising liquid feel genuinely effortless. Once you have this in your back pocket, you'll wonder how you ever cooked without it.
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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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