Does Cornstarch Go Bad: Stop Wondering!

Cornstarch is an additive used for thickening of sauces, pies, breads and cakes. It is made from starch found in corn kernels and stock. There are different types of cornstarch that you can find in supermarkets, sometimes offered in bulk. If you decide to buy in bulk, this article is here to shed some light if cornstarch does go bad.

Does cornstarch go bad? This question might be keeping you wondering especially if you have a bag of cornstarch in your kitchen cabinet for a long period of time. You will be provided valuable information about its shelf life and how to properly store them. In addition, I will discuss some of the ways on how to tell if cornstarch has gone rancid.

Does Cornstarch Go Bad?

If this question has been bothering you, yes it does go bad. However, there are ways in which you can make it last indefinitely, as long as you store it properly and with precaution. Following the steps to proper storage will allow you to make the most out of every ounce you buy in the supermarket.

It should be kept in mind that it is very easy to store cornstarch for a long period of time since it is made of thin and fine powder, unlike other food products. Through precautions and extension of shelf life, you may enjoy the use of cornstarch for a number of years. Cornstarch packages come with sell by dates but it can still be consumed past that date.

Cornstarch has higher risk of going rancid if not stored properly. The “use by date” and “best before date” found in the bags does not necessarily mean that they cannot be used after that date. On the contrary, it is likely to last for years if you store it in a dark, cool and dry place.

In case the cornstarch gets wet with cold water, it will not greatly affect its quality. The reason is because the wetness will dry out due to the cornstarch’s ingredients and properties. Simply put, the cornstarch will most likely absorb the moisture. This is why it is ideal to buy in cornstarch in bulk because it can be kept and used for a long time.

Do you have a bag of cornstarch in your kitchen? If you want to learn how to thicken a sauce using it, click the video link below.

How to Tell if Cornstarch has Spoiled

There are a few signs to look out for if you want to know if the cornstarch you have has gone bad. It is important to note that practicing food safety techniques and proper hygiene will aid in preventing diseases caused by food.

The only way the cornstarch can go rancid is if its gets wet. It disappears if mixed with warm water because the starch molecules bond with hydrogen molecules, which results to water absorption. To add, the material will start to dissipate and eventually lose its form and texture. Cold water however, will not affect the cornstarch that much.

You may notice that if the cornstarch appeared to be thicker, clumpy or mushy, it may be the sign you are looking for to tell if it has gone rancid. You may also use your sense of smell to check if the cornstarch is still in its normal state. If a foul odor comes from it, it is best that you throw it out.

Performing a simple taste test will also tell you if you should still keep the cornstarch or if you need to discard it. If it tastes bad, you have to throw it out. Doing these simple tests is very easy and can be of great help if you want to know the condition of your cornstarch right away.

How to Properly Store Cornstarch

The most important thing you have to take into consideration when storing cornstarch is the place. This product, like most of the other food products, is best stored in dark, cold and dry places. Examples of these places include a pantry, a kitchen cabinet, or a cellar.

The worst environments such as humid, wet and hot areas should be avoided if you want the cornstarch to last for a long period of time. In addition, exposing the cornstarch to external factors such as water and oxygen will speed up the process of spoilage. This is the reason why you will want to find a dark and cool place to store your cornstarch.

Cornstarch can also be stored at room temperature as long as the room is not too hot and is not exposed to direct sunlight. You also opt to transfer the contents of the bag to a dry container that you can seal tightly. It is vital that you remove all the extra air before sealing the container shut.

Once stored inside a container, it should remain in that condition unless you have to use it. It should not be opened if you will not be using it. With this, water and other external elements will not be able to enter the sealed container. You may also store the cornstarch inside the refrigerator for convenience.


Does cornstarch go bad? The answer should be clear by now as we already provided you all the information about this topic. It is always best to be informed about this topic so you can enjoy more dishes using your cornstarch.

  • Yes, cornstarch can go bad if not stored properly. Shelf life can be a number of years as long as it is stored properly.
  • You can tell if the cornstarch has gone bad if it has been exposed to warm water. However, cold water will not affect the composition of the powder. You may either do a taste test and odor test to tell if the cornstarch you have is still usable.
  • Cornstarch should be kept in a cool, dark and dry place. It should also be kept away from direct sunlight and heat.

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