How to Make Cornstarch at Home?

Are you tired of running out of cornstarch in the middle of a recipe? Or are you looking for a more affordable and natural alternative to store-bought cornstarch? Look no further! This comprehensive guide will show you how to make cornstarch right in the comfort of your kitchen. By following these easy steps, you can create your very own cornstarch batch, ensuring you never run out again. So, let’s dive in and discover how to make cornstarch from scratch!

What Is Cornstarch?

Cornstarch, also known as corn flour or maize starch, is a fine white powder derived from the endosperm of corn kernels. It primarily comprises starch, a complex carbohydrate of long chains of glucose molecules. Cornstarch is commonly used as a thickening agent in cooking and baking due to its ability to absorb and hold water, forming a gel-like consistency when heated. It is often used in sauces, gravies, soups, and desserts to add thickness and improve texture. Additionally, cornstarch can be used as a coating for fried foods to create a crispy exterior. It is gluten-free and has a neutral taste, making it suitable for various dietary needs and flavor profiles.

Different Types Of Cornstarch And Their Uses

Cornstarch is a versatile ingredient that comes in various types with unique properties and uses. 

  1. Regular cornstarch, or corn flour, is the most common type and is widely used as a thickening agent in sauces, soups, and gravies. It can also be used to make crispy coatings for fried foods. 
  2. Modified cornstarch has been treated to improve its stability and texture, making it ideal for frozen or refrigerated products like ice cream and pudding. It is also commonly used in canned goods to prevent separation and improve consistency. 
  3. Waxy cornstarch is derived from a specific type of corn and has a higher amylopectin content, which gives it superior thickening properties. It is often used to produce processed foods such as canned fruit, pie, and salad dressings.
  4. Other types of cornstarch include instant cornstarch, which dissolves quickly without cooking, making it suitable for instant puddings and sauces.
  5. Pre-gelatinized cornstarch has been cooked and dried to allow instant thickening when mixed with cold liquids, and organic cornstarch is made from organically grown corn and is free from synthetic pesticides or fertilizers. 

Each type of cornstarch offers unique benefits and can be used in various culinary applications.

The Benefits Of Using Cornstarch In Cooking

Here are some of the advantages of cornstarch in cooking:

  1. Cornstarch is a versatile ingredient that can be used in various cooking applications.
  2. It thickens, making sauces, gravies, and soups thicker and more velvety.
  3. It helps prevent lumps from forming in sauces and custards.
  4. Cornstarch is gluten-free, making it suitable for individuals with gluten sensitivities or celiac disease.
  5. It can be used as a coating for fried foods, creating a crispy and golden exterior.
  6. Cornstarch can make homemade pudding, giving it a smooth and creamy texture.
  7. It is often used in baking to lighten the texture of cakes and cookies.
  8. Cornstarch can be used as a substitute for eggs in some recipes, making it suitable for vegan or egg-allergic individuals.
  9. It helps stabilize whipped cream, keeping it fluffy and preventing it from deflating.
  10. Cornstarch can thicken fruit fillings for pies and tarts, enhancing their consistency.

What Are The Ingredients Required For Making Cornstarch?

Here are some ingredients that are required to make cornstarch:

  • Dried corn kernels
  • Blender or food processor
  • Fine-mesh sieve or cheesecloth
  • Large bowl
  • Clean cloth or paper towels
  • Baking sheet or tray
  • Oven (optional)

What Is The Process Of Making Cornstarch?

Here is a step-by-step guide on how to make cornstarch:

Process Of Making Cornstarch

Step 1: Selecting and Preparing the Corn Kernels

Start by selecting high-quality dried corn kernels. You can find these at specialty stores or online. Ensure the corn kernels are clean and free from mold or contaminants.

Step 2: Grinding the Corn Kernels

Once you have obtained the dried corn kernels, grind them into a fine powder using a blender or food processor. If using a blender, grind small batches at a time to ensure even consistency. Process the kernels until they reach a powdery texture similar to store-bought cornstarch.

Step 3: Sieving the Ground Corn

Transfer the ground corn into a fine-mesh sieve or cheesecloth over a large bowl. Gently shake or tap the sieve to separate the finer particles from larger pieces of corn.

Step 4: Removing Excess Moisture

To remove excess moisture from the ground corn spread it out on a clean cloth or several layers of paper towels. Allow it to air dry for several hours until it feels scorched.

Step 5: Optional Oven Drying

If you want to expedite the drying process, you can also use an oven. Preheat the oven to a low temperature (around 200°F or 93°C) and spread the ground corn on a baking sheet or tray. Place it in the oven for about 1-2 hours, stirring occasionally to ensure even drying. Keep a close eye on it to prevent burning.

Step 6: Final Sieving

Once the ground corn is dried, pass it through the fine-mesh sieve or cheesecloth to remove any remaining clumps or larger particles. This will result in a finer and smoother cornstarch powder.

Step 7: Storing the Cornstarch

Transfer the homemade cornstarch into an airtight container, such as a glass jar or plastic bag. Store it in a cool, dry place away from direct sunlight. Properly stored homemade cornstarch can last for several months.

How To Store Cornstarch?

To store cornstarch:

  1. Store cornstarch in an airtight container to prevent moisture absorption and maintain freshness.
  2. Keep cornstarch in a cool, dry place away from direct sunlight and heat sources.
  3. Avoid storing cornstarch near strong-smelling substances, as it can absorb odors easily.
  4. Label the container with the date of purchase to ensure you use the oldest cornstarch first.
  5. Check for any signs of moisture or clumping before using stored cornstarch.

Can We Freeze Cornstarch?

Yes, cornstarch can be frozen. Freezing cornstarch is a standard method used to extend its shelf life and prevent it from clumping. Cornstarch retains its thickening properties when frozen and can still be used in various recipes. However, it is essential to note that freezing may cause slight changes in texture and consistency. Still, these can usually be remedied by whisking or sifting the thawed cornstarch before use. It is recommended to store frozen cornstarch in an airtight container or freezer bag to prevent moisture absorption.

Can We Make Cornstarch Without Using Corn?

No, it is not possible to make cornstarch without using corn. Cornstarch is derived from the endosperm of corn kernels, which contains a high starch concentration. The process involves separating the starch from the other components of the corn kernel, such as protein and fiber. While alternative starches are available, such as potato starch or tapioca starch, they are derived from different sources and cannot be used interchangeably with cornstarch. Therefore, corn is an essential ingredient in the production of cornstarch.


In conclusion, making cornstarch at home is a simple and cost-effective process that can be done using readily available ingredients. By following the step-by-step guide, individuals can produce their cornstarch, which can be used as a thickening agent in various recipes. It is important to note that while homemade cornstarch may not have the same refined texture as commercially produced versions, it can still serve its purpose effectively.

Frequently Asked Questions (FAQ’s)

How Can I Make Cornstarch At Home?

To make cornstarch at home, grind dried corn kernels into a fine powder using a blender or food processor. Sift the powder to remove any larger particles.

What Can I Use Instead Of Cornstarch?

Instead of cornstarch, you can use alternatives like arrowroot powder, tapioca, or potato starch instead of cornstarch. These alternatives can be used as thickeners in various recipes.

How Do You Make Starch From Flour?

To make starch from flour, you need to separate the starch granules from the other flour components by mixing it with water, allowing it to settle, and then drying the sediment.

How To Make Cornstarch Slurry?

To make a cornstarch slurry, mix equal parts of cornstarch and cold water until smooth, then add it to your desired recipe as a thickening agent.

How To Store Cornstarch?

To store cornstarch, keep it in an airtight container in a cool, dry place to prevent moisture absorption and clumping. Avoid exposing it to heat or direct sunlight.

How To Make Cornstarch Slime?

Mix equal parts of cornstarch and water until you achieve a gooey consistency to make cornstarch slime. Add food coloring or glitter for extra fun.

How To Make Cornstarch From Corn Flour?

Cornstarch is made from corn flour by separating the starch from the other components of the flour through a process called wet milling. The starch is then dried and ground into a fine powder to create cornstarch.