Why seek a healthier alternative to cornstarch?
Cornstarch, a refined carbohydrate derived from corn, is a staple thickener in many kitchens. However, its processing removes most of the fiber, protein, and nutrients, leaving behind primarily starch. For those with corn allergies, seeking less-processed options, or following a grain-free, paleo, or keto diet, exploring alternatives is a must. Some of the benefits you can gain from switching include a boost in dietary fiber, improved gut health from resistant starches, and avoiding genetically modified (GMO) corn.
Healthier substitutes for thickening and cooking
When choosing a cornstarch substitute, consider its thickening power, flavor, and how it holds up under different cooking conditions. Making a slurry (mixing the starch with a cold liquid) is a common technique to prevent clumping before adding it to a hot liquid.
Arrowroot powder
Derived from the root of the Maranta arundinacea plant, arrowroot powder is a popular gluten-free and grain-free alternative. It has a neutral flavor and leaves a glossy, clear finish, making it ideal for fruit sauces, fillings, and glazes.
- Key Consideration: Add arrowroot towards the end of cooking, as it can lose its thickening power when exposed to high, prolonged heat. It also does not combine well with dairy products, which can turn it slimy.
- Substitution Ratio: Use a 1:1 ratio when substituting for cornstarch.
Tapioca starch
Extracted from the cassava root, tapioca starch is another gluten-free, grain-free alternative. It provides a smooth, glossy, and chewy texture, and, like arrowroot, works well for fruit pies and desserts. Tapioca is particularly stable when frozen and thawed, unlike cornstarch.
- Key Consideration: Avoid over-boiling, as it can become stringy or lose its thickening properties. Some brands may have a slightly sweet taste.
- Substitution Ratio: Use 2 tablespoons of tapioca starch for every 1 tablespoon of cornstarch.
Potato starch
Made by crushing potatoes to release their starch, potato starch is a potent gluten-free thickener. It creates a smooth, velvety texture in sauces and gravies and works at lower temperatures than cornstarch.
- Key Consideration: Add potato starch at the very end of cooking, off the heat, to prevent it from breaking down. It does not hold up well to freezing and thawing.
- Substitution Ratio: Use a 1:1 or 1.5:1 ratio of potato starch to cornstarch.
Flaxseed or chia seed gel
For a boost in omega-3 fatty acids and fiber, ground flaxseed or chia seeds can be used as a thickener. When mixed with water, they form a gel-like consistency.
- Key Consideration: This method will impart a nutty flavor and a grittier texture, making it more suitable for heartier stews, gravies, and baked goods.
- Substitution Ratio (Flaxseed): Mix 1 tablespoon of ground flaxseed with 4 tablespoons of water to substitute for 2 tablespoons of cornstarch.
Nut flours and coconut flour
In low-carb and keto cooking, nut flours like almond flour and coconut flour are sometimes used to thicken sauces or stews. Coconut flour is particularly absorbent and high in fiber.
- Key Consideration: Nut flours are not primary thickeners and can result in a grainy texture and alter the flavor. It is often better to use pureed vegetables to thicken and then add nut flours for texture or binding.
Psyllium husk
A type of soluble fiber, psyllium husk forms a thick, gel-like substance when mixed with liquid. It is particularly effective for gluten-free and low-carb baking.
- Key Consideration: A little goes a very long way. Start with a small amount to avoid an overly thick or gelatinous texture. It can also cause digestive issues if too much is consumed.
Xanthan gum
Used in gluten-free baking, xanthan gum is a powerful thickener and stabilizer. A very small amount can produce a significant effect, working in both hot and cold liquids.
- Key Consideration: Use with extreme care, as too much can result in a slimy texture. Some people report digestive issues.
Comparison of cornstarch alternatives
| Feature | Cornstarch | Arrowroot Powder | Tapioca Starch | Potato Starch | 
|---|---|---|---|---|
| Best Uses | Sauces, gravies, pie fillings | Fruit glazes, clear sauces, dairy-free puddings | Fruit fillings, puddings, baked goods | Sauces, gravies, low-temp cooking | 
| Appearance | Opaque, can be cloudy | Clear, glossy | Clear, glossy, slightly translucent | Clear, smooth, silky | 
| Flavor | Neutral | Neutral | Neutral, sometimes slightly sweet | Neutral | 
| Heat Tolerance | High heat, but can lose potency if cooked too long | Low to moderate heat; loses power when boiled | Moderate heat; can become stringy if overcooked | Low to moderate heat; loses power at boiling point | 
| Freezing | Breaks down; not ideal | Not recommended; can become spongy | Freeze-thaw stable | Not ideal; can become watery | 
| Nutrition | Minimal fiber/nutrients | Small amounts of fiber, iron, B vitamins | Minimal nutrients; low calorie | High in resistant starch (raw form) | 
| Gluten-Free | Yes | Yes | Yes | Yes | 
How to incorporate healthier thickeners into your diet
Integrating these alternatives is simple, but requires paying attention to their unique properties.
For sauces and gravies
- Use arrowroot or tapioca starch in acidic sauces or when a glossy finish is desired. Add a slurry towards the end of cooking and stir until thickened.
- For a rich, opaque gravy, a flour roux is a classic method, though it is not gluten-free.
- For gluten-free gravies, potato starch is an excellent choice, added off the heat.
For baking and desserts
- Tapioca starch is a superior choice for fruit pie fillings, offering a glossy finish and holding up well during freezing.
- For gluten-free baking, using a combination of flours, such as rice flour and tapioca starch, can improve texture.
- Xanthan gum or psyllium husk can provide structure in gluten-free baked goods.
For fried foods
- Rice flour creates a crispier, lighter coating on fried foods like tofu or chicken.
- Tapioca starch can also be used for crispy coatings, especially for pan-frying.
Conclusion
While cornstarch is a quick and effective thickener, several alternatives offer nutritional advantages and cater to specific dietary needs. Arrowroot, tapioca starch, and potato starch provide excellent, gluten-free thickening, while ground flaxseed adds fiber and omega-3s. Ultimately, the best choice depends on the recipe and your desired health outcomes. Understanding the unique properties of these substitutes empowers you to make smarter, more nutritious choices in your cooking and baking.
Reference
- Healthline. "5 of the Healthiest Flours for Every Purpose". 18 April 2023. https://www.healthline.com/nutrition/healthiest-flour