Shelf Life of
Corn Starch

How Long Does Corn Stach Last?

How long does cornstarch last?

Does Cornstarch go bad?

How long does cornstarch last? Does cornstarch go bad?.
The shelf life of cornstarch depends mostly on how the cornstarch is stored. Cornstarch is a fine powder made from the starch in corn kernels. It is used mainly as a thickening agent in sauces, gravies and pies.

So, does cornstarch go bad? When stored properly, the answer is no! The shelf life of cornstarch is actually …

(Opened/Unopened) Pantry
Past Printed Date
Cornstarch lasts for Indefinite



All foods last for a shorter period of time if they are not stored properly. Like a lot of other baking products, it may have a best before date but will not have an expiration date. Because of this distinction, you may safely use it for your baking needs after the best before date has lapsed.

How to tell if cornstarch is bad, rotten or spoiled?

Basically, the only way cornstarch will go bad is if it gets wet.
Cornstarch basically disappears in warm liquid as the starch molecules bond with hydrogen molecules and then absorb the water. The sauce to which cornstarch is introduced first becomes cloudy and then translucent and thick.
If your cornstarch has gone bad, check our substitutes page.
Practicing proper hygiene and food safety discipline will help prevent food borne illness.

How to store cornstarch to extend its shelf life?

Proper food storage is the key to extending the expiration date of food.
Cornstarch should be kept covered in a cool dark place (the pantry) away from moisture. The best way to store it is in its original container with the lid re-sealed.
As long as it remains dry, it will remain safe to use since the shelf life of cornstarch is really indefinite.

Any interesting facts about cornstarch?

  • When cornstarch is mixed with cold water, there is no reaction and the starch sinks to the bottom of the liquid.
  • Cornstarch works great to thicken gravy and much more.

  • How long is cornstarch good for when prepared in a dish?

    How long does cornstarch last? That depends. How long does pie last? All foods can only last as long as the quickest expiring ingredient that they are mixed with in any recipe. To find out how long other ingredients are good for, please visit the Dairy, Drinks, Fruits, Grains, Proteins, Vegetables and Other sections of Eat By Date or search below!

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    What are our shelf life resources?

    Our research into does cornstarch go bad incorporates data from multiple resources, including the United States Department of Agriculture and the United States Food & Drug Administration. In addition, we scoured the web for informative articles and reports related to food safety, food storage and shelf life.

    *An important note about expiration dates …

    Although the shelf life information on Eat By Date is generally reliable, please remember that individual cases will vary and that our advice should only be taken as an opinion and not replace the advice of a health care provider. So, how long will food last? Let’s find out!