If you need a substitute for cornstarch, the right choice depends on whether you are thickening a sauce, coating fried food, or baking.
This guide explains the most reliable alternatives, how they perform, and the exact substitutions that keep recipes consistent.
What cornstarch does in recipes
Cornstarch is a refined starch made from corn endosperm.
In cooking, it is valued for its neutral flavor, fine texture, and strong thickening power when heated with liquid.
It is commonly used to:
- Thicken sauces, gravies, soups, and pie fillings
- Improve the texture of custards and puddings
- Create crisp coatings for frying
- Stabilize certain baked goods and frozen desserts
Because cornstarch thickens at relatively low temperatures and produces a glossy finish, replacements should be chosen with the final texture in mind.
Best substitute for cornstarch in cooking
The best substitute for cornstarch in most stovetop recipes is arrowroot powder.
It thickens similarly, stays clear, and works well in acidic mixtures.
However, different alternatives perform better in different applications.
The most practical options include:
- Arrowroot powder
- Potato starch
- Tapioca starch
- All-purpose flour
- Rice flour
- Gluten-free flour blends
- Xanthan gum
- Ground flaxseed or chia seeds for some recipes
Arrowroot powder as a substitute for cornstarch
Arrowroot powder is one of the closest matches to cornstarch.
It is a starch extracted from tropical roots and is popular in gluten-free and paleo cooking.
Use ratio
Use 2 teaspoons of arrowroot powder for every 1 tablespoon of cornstarch.
Best uses
- Stir-fry sauces
- Fruit pie fillings
- Clear glazes
- Acidic sauces such as citrus or tomato-based recipes
Limitations
Arrowroot does not hold up well in dairy-heavy recipes or prolonged high heat.
It can become slimy if overcooked, so add it near the end of cooking.
Potato starch as a substitute for cornstarch
Potato starch is another excellent thickener with strong performance in sauces and soups.
It is especially useful when a smooth texture is important.
Use ratio
Use 1 tablespoon of potato starch in place of 1 tablespoon of cornstarch.
Best uses
- Soups and stews
- Gravies
- Breading for frying
- Gluten-free baking
Limitations
Potato starch breaks down if boiled too long, so add it after reducing heat or at the end of cooking.
It also absorbs moisture quickly, which can affect storage in baked goods.
Tapioca starch as a substitute for cornstarch
Tapioca starch, also called tapioca flour, comes from cassava root and is common in gluten-free baking.
It adds elasticity and a slightly glossy finish.
Use ratio
Use 2 tablespoons of tapioca starch for every 1 tablespoon of cornstarch.
Best uses
- Fruit fillings
- Puddings
- Pie fillings
- Gluten-free baked goods
Limitations
Tapioca can create a stretchy texture, which is desirable in some recipes but not in others.
It may also make fillings slightly stringy if overused.
All-purpose flour as a substitute for cornstarch
All-purpose flour is the most accessible thickener in many kitchens, but it does not thicken as efficiently as cornstarch and produces a cloudier result.
Use ratio
Use 2 tablespoons of flour for every 1 tablespoon of cornstarch.
Best uses
- Gravies
- Stews
- Pan sauces
- Roux-based recipes
Limitations
Flour needs longer cooking to remove the raw taste and does not work well in recipes that require a clear, glossy finish.
It is also not suitable for gluten-free diets.
Rice flour and gluten-free flour blends
Rice flour can work as a substitute for cornstarch in light sauces and coatings.
It is milder than wheat flour and is often used in Asian cooking.
Use ratio
Use 2 tablespoons of rice flour for every 1 tablespoon of cornstarch.
Best uses
- Coatings for fried foods
- Light sauces
- Tempura-style batters
Pre-mixed gluten-free flour blends can also replace cornstarch in some recipes, but results vary by brand because blends may contain rice flour, tapioca starch, potato starch, or xanthan gum.
Can xanthan gum replace cornstarch?
Xanthan gum can replace cornstarch in very small amounts, especially in gluten-free cooking, but it behaves differently from starches.
It is powerful, so a little goes a long way.
Use ratio
Start with 1/4 teaspoon of xanthan gum for every 1 tablespoon of cornstarch and adjust carefully.
Best uses
- Cold sauces
- Dressings
- Gluten-free baking
- Low-carb recipes
Limitations
Too much xanthan gum creates a slimy or gummy texture.
It is best for stabilization rather than classic starch thickening.
Can you use flour instead of cornstarch for frying?
Yes, flour can replace cornstarch for dredging and light coatings, but the texture will be less crisp.
Cornstarch creates a drier, crunchier crust because it contains less protein and forms a thinner coating.
For better crispiness, many cooks combine flour with rice flour, potato starch, or baking powder.
This approach is common in fried chicken, tempura-style batters, and stir-fry coatings.
How to choose the right substitute for cornstarch
Select the replacement based on the dish, cooking method, and dietary needs.
- For clear sauces and fruit fillings: arrowroot or tapioca starch
- For soups and gravies: potato starch or flour
- For gluten-free cooking: arrowroot, potato starch, tapioca starch, or xanthan gum
- For frying: cornstarch alternatives with low protein, such as potato starch or rice flour
- For baking: tapioca starch or gluten-free flour blends
Common mistakes when replacing cornstarch
Small technique differences can affect the final result.
Avoid these common errors when using a substitute for cornstarch.
- Adding starch directly to hot liquid without first mixing it with cold water
- Boiling arrowroot or potato starch for too long
- Using too much xanthan gum
- Expecting flour to produce the same clarity as cornstarch
- Substituting one starch for another without adjusting the amount
For best results, make a slurry when the recipe calls for one: mix the starch with cold water before stirring it into the dish.
This helps prevent lumps and improves consistency.
Quick substitution guide
- 1 tablespoon cornstarch = 2 teaspoons arrowroot powder
- 1 tablespoon cornstarch = 1 tablespoon potato starch
- 1 tablespoon cornstarch = 2 tablespoons tapioca starch
- 1 tablespoon cornstarch = 2 tablespoons all-purpose flour
- 1 tablespoon cornstarch = 2 tablespoons rice flour
- 1 tablespoon cornstarch = 1/4 teaspoon xanthan gum
When not to substitute cornstarch
Some recipes depend on cornstarch’s specific behavior.
If a recipe relies on a glossy finish, very fast thickening, or a precise texture, alternatives may need testing before serving to guests.
This matters especially in professional baking, confectionery, and Asian-style sauces.
If you are cooking for a gluten-free, grain-free, or low-FODMAP diet, the best substitute for cornstarch may be different from one recipe to the next.
Choosing by function instead of by name gives more reliable results.
