
Thickening a sauce or soup without seeds sounds simple until you realize how many common thickeners β sesame, poppy, even some spice blends β can sneak seeds into the mix. Arrowroot starch is a clean, neutral-flavored alternative that works beautifully without any of those concerns. Just two ingredients and a quick whisk are all it takes to create a smooth slurry that transforms a thin broth or sauce into something glossy and restaurant-worthy. The key is adding it to a gently simmering liquid while stirring constantly, then pulling it off the heat as soon as it thickens β arrowroot is a little temperamental with high heat, but once you get the hang of the timing, it's incredibly reliable. The result is a light, silky coating consistency that won't cloud your dish or leave any starchy aftertaste. Keep this ratio in your back pocket and you'll never be stuck with a watery pan sauce 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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