Cornstarch is an essential pantry item with many uses — from thickening sauces to dusting surfaces for rolling dough.
But if you've had a cornstarch package tucked away in a cupboard for years, does cornstarch go bad? Or can you still use it as needed without issue? Or, if you want to know how long does cornstarch last?
In this blog post, we'll cover the key points of whether or not cornstarch goes bad and offer tips on storing your cornstarch safely so that it stays fresh when cooking needs arise!
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Introduction to Cornstarch
Cornstarch is a fine powder substance made from corn kernels and used as a thickening agent in recipes like sauces, gravies, and puddings. It also has other uses, such as polishing silverware or helping to absorb odors in the fridge.
What Is the Average Cornstarch Shelf Life?
On average, corn starch has an indefinite shelf life when stored properly. This means the expiration date will not be a concern, as it will be fine.
Does Cornstarch Go Bad?
Generally speaking, cornstarch does not go bad quickly. It has a very long shelf life if kept in a sealed bag or airtight container in a cool and dry place. However, some circumstances can cause cornstarch to spoil.
How Can You Tell if Cornstarch Is Spoiled?
Here are some of the signs that cornstarch has gone bad:
Smell
The most common sign of spoiled cornstarch is a musty or moldy smell. This indicates that the starch has been exposed to moisture, which causes mold to grow. It will also have an off-putting or sour flavor.
Mold
If you see any visible signs of mold, discard the cornstarch immediately. Mold can produce toxins that can make you sick if ingested.
Taste
If the cornstarch has an off or sour taste, it means that your cornstarch has gone bad.
Texture
You may also notice that the cornstarch has clumped together and is difficult to break apart. This usually happens when it's been exposed to moisture. For instance, if it gets exposed to moisture or humidity, it can turn lumpy and lose its thickening properties.
If you find lumpy cornstarch, it won't be suitable for cooking, so it's best to throw it out.
How Should You Store Cornstarch Properly?
The best way to keep cornstarch safe and fresh is to store it in an airtight container or airtight jar, away from direct sunlight and moisture exposure, in a cool dark place.
It should also be stored away from direct sunlight, which can cause the starch to break down prematurely.
Additionally, make sure you choose an airtight container as it won't let dust or other particles get inside, which can contaminate the product. Regularly inspect and clean containers to ensure you are getting unspoiled, usable cornstarch on hand.
What Is the Best Cornstarch Container?
Choosing a suitable container for storing cornstarch is an important decision. You want a durable, user-friendly container with a good seal. The best containers for storing your cornstarch are those made of plastic or steel.
Plastic containers come in many different sizes and have good sealing lids, perfect for keeping the cornstarch from becoming damp and lumpy. Steel containers are heavy-duty and offer excellent protection from air and moisture, both essential in preserving freshness!
With such a variety, you can find the ideal container for all your cornstarch needs!
What if I Find Pantry Bugs in Cornstarch?
Finding pantry bugs inside your cornstarch can be a nightmare! First, discard any pantry cornstarch that has become contaminated. Then, empty all other pantry items and food products, putting them in sealed plastic bags. Thoroughly clean and vacuum pantry shelves and dry mop, then dispose of all vacuumed material outside your home.
Does Cornstarch Last Longer Than Baking Powder?
Cornstarch and baking powder are very different ingredients, but what about shelf life? The answer to that question might surprise you.
Cornstarch has an indefinite shelf life if stored correctly in an airtight container and not attacked by pantry bugs.
This means the shelf life of cornstarch is greater than baking powder - which is shelf stable for only a few months and must be replaced afterward. So, cornstarch has the upper hand when it comes to shelf life!
FAQ'S
Yes, you can freeze cornstarch for long-term storage. Transfer the starch to a freezer bag or airtight container and keep it in the freezer. The frozen cornstarch will remain good for up to two years.
To use the frozen cornstarch, thaw it overnight in the refrigerator before using it. Once thawed, use the cornstarch as soon as possible. It will not last long once thawed, so use it quickly.
Eating expired cornstarch is generally not recommended as it may have lost its thickening power and can contain mold or other contaminants. Discarding any old or expired cornstarch and purchasing a new container is best.
Cornstarch and corn flour are two very different products, even though they're often confused for the same thing.
While cornstarch is made from corn kernels that have been ground into a white powder and contain only the starchy part of corn, cornflour is a much more specialized product that uses an entire corn kernel—bran, germ, and endosperm—ground up into a powder.
Although flour has different properties, it can be used as a substitute for cornstarch.
Flour is denser and contains gluten, making it more difficult to thicken sauces or gravies. It also doesn't absorb moisture as effectively as cornstarch, so you may need to use more flour than you would if using cornstarch.
Yes, cornstarch is gluten-free. It's made from corn which does not contain any gluten. This makes it a healthy alternative to flour for those with gluten intolerance.
Wrapping Up
Cornstarch is more than just a thickener—it's a culinary secret weapon with a ridiculously long shelf life!
As long as you store it properly in a cool, dry place, it’ll be ready to work its magic whenever you need it.
From velvety gravies to crispy fried chicken, cornstarch brings texture, shine, and flavor to your meals like a pro. Plus, it's keto-friendly, vegan, gluten-free, and easy to find in the baking aisle of any grocery store.
So, say goodbye to lumpy sauces and hello to smooth, thickened perfection. Keep that cornstarch handy—you’ll never know when your next cooking masterpiece will need it!
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