Does Xanthan Gum Replace Cornstarch?

Xanthan gum and cornstarch are commonly used ingredients in cooking and baking, but they have distinct properties and purposes. While they can sometimes be used interchangeably, it is important to understand their differences and when to use one instead of the other.

In this article, we will delve into the characteristics of xanthan gum and cornstarch, and discuss their advantages, limitations, and potential substitutions.

Understanding Xanthan Gum

Xanthan gum, a polysaccharide derived from the fermentation of certain bacteria with sugar, is a valuable thickening agent, stabilizer, and emulsifier in various food products. It uniquely creates a gel-like texture when combined with liquids, significantly enhancing the consistency and stability of many recipes.

Advantages of Xanthan Gum

  1. Thickening Power: Xanthan gum exhibits remarkable thickening power, requiring only a small teaspoon to thicken a large amount of liquid. Its superior thickening ability compared to other thickeners makes it particularly desirable in gluten-free baking, where maintaining proper texture is crucial.
  2. Gluten Substitute: In gluten-free recipes, xanthan gum is frequently utilized to mimic the texture and elasticity that gluten provides in traditional baking. It effectively improves the structure and moisture retention of gluten-free bread, cakes, and pastries.
  3. Stabilizer: Acting as a stabilizer, xanthan gum prevents ingredients from separating or settling, ensuring a uniform texture and appearance in sauces, dressings, and beverages.

Limitations of Xanthan Gum

  1. Gummy Texture: Excessive usage of xanthan gum can result in a gummy or slimy texture, which may not be desirable in certain recipes. It is important to exercise caution and follow recommended quantities to avoid this undesirable outcome.
  2. Cost: Xanthan gum can be relatively more expensive compared to cornstarch, especially when larger quantities are required. It is essential to consider the cost implications when deciding between the two.

Understanding Cornstarch

Cornstarch, also known as cornflour, is a fine white powder derived from the endosperm of corn kernels. It primarily functions as a thickening agent, adding texture and body to sauces, soups, and desserts. Being a natural and widely available ingredient, cornstarch serves as a popular choice for various culinary applications.

Advantages of Cornstarch

  1. Neutral Taste: Cornstarch possesses a neutral taste, making it suitable for a wide range of recipes without significantly altering the flavor. It allows other ingredients to shine while providing the desired thickening effect.
  2. Cost-effective: Compared to xanthan gum, cornstarch is generally more affordable, making it a budget-friendly option for thickening various dishes. It offers an economical solution, especially when larger quantities are needed.
  3. Crisp Coating: When used as a coating for frying foods, cornstarch plays a pivotal role in creating a crispy and golden exterior. It adds a delightful texture to fried dishes, making them visually appealing and enjoyable to eat.

Limitations of Cornstarch

  1. Not Suitable for Cold Liquids: Cornstarch requires heat to thicken properly, rendering it unsuitable for recipes that need to be thickened at room temperature or with cold liquids. It is crucial to note this limitation when considering it as a thickening agent.
  2. Less Stable in Acidic Conditions: Cornstarch can lose its thickening ability when exposed to acidic ingredients like lemon juice or vinegar. It may break down, resulting in a thinner consistency. Recipes containing acidic elements require alternative thickeners or modified preparation methods.
  3. Potential for Cloudiness: In specific recipes, cornstarch can introduce a cloudy appearance, which might not be desirable for clear sauces or gravies. It is important to consider the desired visual appeal when deciding whether to use cornstarch as a thickener.

Substituting Xanthan Gum for Cornstarch

While xanthan gum may not always be a direct replacement for cornstarch, it can be used as a substitute in certain situations. Here are some considerations when using xanthan gum as a replacement for cornstarch:

  1. Gluten-Free Recipes: Xanthan gum is particularly valuable in gluten-free recipes where cornstarch is commonly used as a thickening agent. By enhancing the texture and consistency of gluten-free baked goods, it creates a similar structure to those made with gluten.
  2. Reduced Starch Content: Xanthan gum is suitable for recipes that require a thickening agent but need to limit the starch content. This can be beneficial for individuals on low-carb or keto diets, providing an alternative without sacrificing the desired texture.
  3. Improved Stability: Xanthan gum is often preferred in recipes that necessitate stability and resistance to temperature changes or extended storage periods. By preventing syneresis, which is the separation of liquid from a gel-like substance, it ensures the longevity of the desired texture and consistency.

Substituting Cornstarch for Xanthan Gum

While cornstarch may not always be an ideal replacement for xanthan gum, it can serve as an alternative in certain scenarios. Here are some considerations when using cornstarch as a substitute for xanthan gum:

  1. Heat-Activated Recipes: Cornstarch is an excellent choice for thickening sauces, soups, and gravies that require heat for activation. It thickens and develops a glossy texture when heated, imparting a smooth and velvety mouthfeel to dishes.
  2. Cost-Conscious Options: When cost is a concern, using cornstarch as a thickener can be a more economical choice, particularly when large quantities are needed. It provides a budget-friendly solution without compromising on the desired thickening effect.
  3. Baking Applications: In baking, cornstarch can be employed as a replacement for xanthan gum when thickening is not the primary purpose. It is commonly added to cake and cookie recipes to create a tender texture and prevent excessive spreading, contributing to the overall quality of the baked goods.


In conclusion, xanthan gum and cornstarch are versatile ingredients with distinct properties and functions. Xanthan gum excels in gluten-free recipes, acts as a stabilizer, and enhances stability when required. On the other hand, cornstarch is ideal for thickening sauces, soups, gravies, and creating crisp coatings in frying.

While they can sometimes be used interchangeably, it is crucial to consider the specific requirements and limitations of each ingredient when substituting one for the other. Through experimentation and understanding the desired outcome of a recipe, the most suitable option for achieving the desired results can be determined.

Dr. Renata Micha

Meet Dr. Renata Micha, a wellness and nutrition expert passionate about helping people live healthier lives through good nutrition. With a diverse academic background in human nutrition and dietetics, she holds a Ph.D. and has worked in various institutes across the US.

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