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How to Make Starch from Corn: A Step-by-Step Guide

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Corn starch, a fine, powdery substance derived from corn kernels, serves as a versatile and essential ingredient in various culinary and industrial applications. Whether you’re looking to thicken sauces, bake delicious treats, or create homemade crafts, making corn starch from corn at home can be a rewarding and straightforward process. In this guide, we’ll take you through the steps of making corn starch from scratch, right in the comfort of your kitchen.

What You’ll Need:

  • Fresh or dried corn kernels
  • Blender or food processor
  • Cheesecloth or fine-mesh strainer
  • Bowl
  • Water
  • Saucepan
  • Stove

Step 1: Prepare the Corn Kernels

Start by selecting fresh, sweet corn on the cob or dried corn kernels. If using fresh corn, remove the kernels from the cob by slicing downwards with a sharp knife. For dried corn kernels, you can find them in grocery stores or specialty shops.

Step 2: Grinding the Corn

Transfer the corn kernels to a blender or food processor. Grind the kernels until you obtain a fine, smooth powder. The finer the powder, the better the starch extraction will be.

Step 3: Creating the Slurry

In a bowl, mix the corn powder with water to create a slurry. The ratio of corn powder to water should be approximately 1:2. Stir the mixture until it forms a smooth, lump-free paste.

Step 4: Separating the Starch

Take the cheesecloth or fine-mesh strainer and place it over another bowl or container. Pour the corn slurry onto the cheesecloth/strainer, allowing the liquid to pass through while trapping the solids (corn starch) on top.

Step 5: Rinse and Settle

Rinse the trapped corn starch with water to wash away any residual impurities or proteins. Gently stir the starch in the water and then let it sit for a few minutes to allow the heavier starch particles to settle at the bottom.

Step 6: Collecting the Starch

After the settling period, carefully pour off the water, taking care not to disturb the settled starch at the bottom. You may need to repeat this process a couple of times until the starch appears clean and white.

Step 7: Drying the Starch

Spread the collected starch onto a flat surface or tray to dry. You can leave it in a well-ventilated area or use a low-temperature oven to speed up the drying process. Ensure the starch is completely dry before storing it.

Step 8: Storing the Corn Starch

Once the corn starch is dry, transfer it to an airtight container or a resealable plastic bag. Store it in a cool, dry place, and your homemade corn starch will stay fresh for several months.

Congratulations! You’ve successfully made corn starch from corn kernels. Now you can use this natural and additive-free starch in your cooking, baking, and crafting endeavors.


  • For a smoother starch, you can repeat steps 4 to 6, washing the collected starch multiple times.
  • If you’re using fresh corn, you can dry the kernels in the sun before grinding to make the process easier.
  • The remaining liquid after extracting the starch is called “corn milk.” It can be used as a nutritious addition to soups or other recipes.

Remember, making your own corn starch allows you to have full control over the process and ensures a natural, preservative-free product. Enjoy experimenting with your homemade corn starch in various recipes and discover the joy of crafting your own ingredients right at home!

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