
Cornstarch is off the table on a grain-free elimination protocol, and many store-bought thickeners sneak in additives that can derail your reset before you even realize it. Arrowroot starch is the clean, compliant answer β it's derived from a root vegetable and contains nothing but itself. Just two ingredients and a quick whisk are all it takes to transform a thin, watery sauce or broth into something glossy, silky, and restaurant-worthy. The key technique here is adding the slurry to a gently simmering liquid while stirring constantly, then pulling the pan off the heat as soon as things tighten up β arrowroot is sensitive to prolonged high heat and will thin back out if you push it too far. Once you nail that timing, you'll wonder how you ever finished a pan sauce without it. Keep this ratio in your back pocket and you'll never serve a runny stew or soup again.
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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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