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How Long Does Corn Syrup Last? Does it Go Bad?

Are you ever confused about all the types of sweeteners available on the shelf at your local grocery store?

There’s sugar, molasses, light and dark corn syrup—and then there are questions about how long they last.

That same confusion has likely crossed your mind when it comes to corn syrup.

Does it go bad eventually or could you store a bottle in your kitchen cupboard indefinitely?

Read on to learn all the details you need for storage and expiration when it comes to this popular topping and baking companion.

What is Corn Syrup?

Corn syrup is a type of sugar that is made from corn.

It is a thick, sticky liquid that is used in many different foods and recipes.

Corn syrup is very sweet and has a slightly different flavor than other types of sugar.

It is often used in baking and candy making because it helps to keep things moist and prevents them from drying out.

Corn syrup can also be used as a topping for pancakes and waffles.

What are The Different Types of Corn Syrup?

Corn syrup is a type of sugar made from corn that is used in many different foods and beverages.

There are three main types of corn syrup: light, dark, and high fructose.

Light corn syrup is the most common type of corn syrup and has a mild flavor.

It is often used in baking and as a sweetener in drinks.

Dark corn syrup has a darker color and a richer flavor than light corn syrup.

It is often used to add flavor to food or to makecoholic beverages.

High fructose corn syrup is a type of corn syrup that has been processed to contain more fructose.

It is often used as a sweetener in processed foods and beverages.

How Long Does Corn Syrup Last?

Corn syrup is a liquid sweetener made from cornstarch.

It’s often used in baking and candy making because it’s less likely to crystallize than other types of sugar.

Because it’s so versatile, you may be wondering if corn syrup goes bad and how long it will last.

The good news is that corn syrup has a fairly long shelf life and doesn’t go bad as quickly as some other food items.

However, over time it can start to form crystals and become thick and hard to use.

If this happens, you can simply heat the corn syrup to re-liquify it.

As far as how long corn syrup will last, unopened bottles of corn syrup will be fine for 2-3 years when stored in a cool, dark place.

Once opened, the syrup will last for 6-12 months.

If you notice any mold growing on the syrup, or if it starts to develop an off odor, throw it out.

So, does corn syrup go bad? Yes, eventually it will start to crystalize and thicken.

However, it has a long shelf life and is still safe to use even after it’s been opened for awhile.

Just be sure to give it a sniff before using it to make sure it hasn’t developed any off odors.

How to Store Corn Syrup?

If you’re like most people, you probably have a bottle of corn syrup sitting in your pantry.

But how long does corn syrup last? And how should you store it to make sure it stays fresh?

Corn syrup is a type of sugar syrup made from corn starch.

It’s used in a variety of recipes, from candy to baked goods.

Corn syrup is available in both light and dark varieties.

The light corn syrup is clear and has a mild flavor, while the dark corn syrup is darker in color and has a molasses-like flavor.

Corn syrup will last indefinitely if stored properly.

That means keeping it in a cool, dark place in an airtight container.

If you keep your corn syrup in the fridge, it will thicken and become difficult to pour.

You can also freeze corn syrup, though it may become grainy when thawed.

So there you have it. Now you know how to store corn syrup to make it last as long as possible.

How to Tell If Corn Syrup is Bad?

Corn syrup is a type of sugar that is derived from corn.

It is often used as a sweetener in food and beverages.

While it is not as sweet as table sugar, it has a similar taste.

Corn syrup is also less likely to crystallize than sugar, which makes it ideal for use in candy and frosting.

Corn syrup can last for months or even years if stored properly.

However, over time, it may darken in color and develop a slightly bitter taste.

If this happens, the corn syrup is still safe to use but it may not be as desirable.

To tell if corn syrup has gone bad, look for signs of spoilage such as mold, off-color patches, or an unpleasant odor.

If the corn syrup has any of these signs, it should be discarded.

Can You Freeze Corn Syrup?

You can freeze corn syrup, but it may not be as effective as other methods of preserving it.

Corn syrup is a liquid, so it will expand when frozen and may break the container it is in.

To prevent this, you should leave some space at the top of the container before freezing.

Once thawed, corn syrup may not be as thick or syrupy as it was before freezing.

For these reasons, it is best to use other methods of preserving corn syrup if possible.


Most types of corn syrup have a relatively long shelf life and can be stored for several years.

However, it’s important to note that the quality of your corn syrup may degrade over time.

If you’re unsure whether your corn syrup is still good, it’s always best to err on the side of caution and throw it out.

Thanks for reading.

We hope this article was helpful in answering your question.

How Long Does Corn Syrup Last? Does it Go Bad?

5 from 1 vote
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Course Shelf Life
Servings 1 Serving


  • Corn syrup
  • Air-tight containers or Ziplock bags
  • Labels and markers


  • Store your product in an labelled container in a cool, dark place like the pantry or fridge.
  • If your food is frozen, allow it to thaw in the fridge before cooking.
  • Make sure to look for signs that your food has gone bad before eating it.
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