Arrowroot powder (also called arrowroot starch or arrowroot flour) is a fine white starch extracted from the rhizomes of the Maranta arundinacea plant, native to tropical regions of the Americas. Like cornstarch, arrowroot is used primarily as a thickening agent in sauces, gravies, pie fillings, puddings, and soups. It produces a beautifully clear, glossy gel with a neutral flavor that doesn't cloud the appearance of delicate sauces. It's a popular choice in paleo and clean-eating cooking because it's grain-free and less processed than some other starches.
You might need a substitute for arrowroot powder if it's not available at your local grocery store (it's less commonly stocked than cornstarch), if you're looking for a less expensive alternative, or if a specific starch property like freeze-thaw stability is important for your recipe. Arrowroot has notable advantages in some applications — it tolerates acidic ingredients better than cornstarch, creates a more delicate gel, and works at lower temperatures — but it also has limitations, particularly its tendency to break down and become slimy when overcooked or held at high temperatures for extended periods.
Understanding when arrowroot excels compared to other starches helps you pick the best substitute: it's ideal for clear, delicate sauces and fruit pie fillings but less suited to dairy-based sauces (where it can become slimy) or dishes that need to hold warm for long periods.
■Best Substitutes for Arrowroot Powder
These substitutes work in sauces, gravies, pie fillings, puddings, and other recipes that call for arrowroot powder as a thickener.
| Substitute | Flavor / Texture Match | Swap Ratio |
|---|---|---|
| Cornstarch | Very similar — slight cloudiness in some sauces | 1:1 |
| Tapioca Starch | Glossy, slightly chewy — good freeze-thaw stability | 1:1 |
| Potato Starch | Clear, strong thickener — use quickly | 1:1; don't overboil |
| Kuzu (Kudzu) Starch | Neutral, clear, traditional in Japanese cooking | 1:1 |
| Rice Flour | Slightly cloudy, mild flavor | 2 tbsp rice flour per 1 tbsp arrowroot |
| All-Purpose Flour | Opaque, classic texture — not paleo | 2 tbsp AP flour per 1 tbsp arrowroot |
| Glucomannan (Konjac) | Very powerful — keto-friendly, extremely low carb | Use 1/4 to 1/3 the amount |
■How to Choose the Right Substitute
For the closest match to arrowroot powder in terms of appearance, clarity, and neutral flavor, cornstarch is the most practical substitute. It's available in virtually every grocery store, inexpensive, and can be used in a 1:1 ratio. The primary differences: cornstarch doesn't perform as well in acidic sauces (lemon or vinegar can cause it to thin out slightly), it requires a higher temperature to fully gelatinize, and sauces thickened with cornstarch tend to become opaque when reheated multiple times. For everyday thickening tasks, these differences are negligible.
Tapioca starch is arguably the best overall substitute for arrowroot because it shares several of arrowroot's key properties: it produces a clear, glossy gel, tolerates some acidity, and — crucially — has better freeze-thaw stability than either cornstarch or arrowroot. If you're making a sauce or pie filling that will be frozen and reheated, tapioca starch is the best option of the three. It can also be used in a 1:1 ratio with arrowroot.
Potato starch produces a very clear, strong gel similar to arrowroot and is used in the same 1:1 ratio. Its key weakness is heat sensitivity: once the sauce has thickened with potato starch, prolonged boiling will cause the starch chains to break apart and the sauce will thin back out. Add potato starch near the end of cooking, bring the sauce just to a brief boil or simmer, and serve promptly. Potato starch is an excellent substitute in short-cooked applications but not for dishes that simmer for extended periods.
■Frequently Asked Questions
Why does arrowroot sometimes make dairy sauces slimy? Arrowroot starch interacts with proteins in dairy in a way that can produce an unpleasant, slimy or stringy texture rather than a smooth, velvety one. This reaction is most pronounced in milk-based and cream-based sauces. For dairy sauces and cream soups, cornstarch or a flour-based roux are better choices since they don't produce this slimy effect with dairy proteins.
What is the freeze-thaw stability of different starches? Freeze-thaw stability refers to how well a starch-thickened sauce or filling holds up after being frozen and then thawed. Cornstarch and arrowroot-thickened sauces often become watery or "weepy" after freezing because the starch retrogrades (re-crystallizes) during freezing, squeezing out water. Tapioca starch and modified food starches have much better freeze-thaw stability. If you're making foods that will be frozen, tapioca starch is the top choice among common starches.
Can arrowroot powder be used in baking? Yes, arrowroot powder has some baking applications. Like cornstarch, it can be used to lighten the protein content of all-purpose flour (as a partial substitution to mimic cake flour). It's also used in gluten-free cookie recipes to add crispness and in some GF flour blends as a binding and texturizing agent. However, unlike cornstarch, arrowroot can make baked goods slightly gummy if over-used, so use it sparingly.
Is arrowroot powder suitable for vegans and people with common allergies? Yes. Arrowroot powder is plant-derived, completely vegan, and free from the top eight common allergens (wheat/gluten, dairy, eggs, soy, peanuts, tree nuts, fish, and shellfish). It's also grain-free, making it suitable for paleo and AIP (Autoimmune Protocol) diets. Gelatin (animal-derived) is a common alternative thickener that arrowroot can replace in vegan recipes where the goal is to set a liquid rather than just thicken it.
Does arrowroot thicken more quickly than cornstarch? Yes. Arrowroot thickens at lower temperatures than cornstarch — roughly 140–160°F (60–71°C) for arrowroot compared to 165–200°F (74–93°C) for cornstarch. This makes arrowroot useful in preparations that shouldn't be brought to a vigorous boil. However, the downside is that arrowroot's texture can degrade if kept at high temperatures for too long, becoming more liquid again as the starch chains break apart.
See also: Food Substitutes Guide | Cornstarch Substitutes | Tapioca Starch Substitutes