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How long does Corn Syrup last? Does it Go Bad?

People use corn syrup to make pancakes; it is a cost-effective substitute for maple syrup.

The syrup is mainly used for cooking or adding processed food at the industrial level.

If you plan to use this ingredient in your kitchen, then having some essential detail is necessary.

While using syrup people are concerned about fact does Corn Syrup go bad.

How to store syrup for a long time use? How to ensure that they are in good condition? Generally, such syrup is used till the date provided on their packing, but it does not mean they cannot be used after that.

What is Corn Syrup?

Corn Syrup is sweet and edible syrup made by breaking down cornstarch.

Process of making it is simple, either by providing heat with a dilute acid to cornstarch or adding it with enzymes.

Mainly processed food contains high-fructose corn syrup that is sweeter than normal.

There is mainly manufacturing of two types of corn syrup; light and dark.

Dark corn syrup has a flavor similar to molasses and is darker in color than caramel-colored light corn syrup.

Light-colored syrup is an option that is known to have a vanilla flavor.

Corn Syrup is an ingredient that is easily available in commercial stores.

While getting a bottle of it from the market, ensure to go through its expiry date.

Even if you notice any signs of spoilage or leakage, then avoid purchasing such a bottle.

People use syrup for various purposes:

  • As a sweetening ingredient in making candies, jams, jellies, etc.
  • Used to bake cookies, rice crispies, caramel snacks, nutritional bars.
  • Commonly used in chocolates, cakes, and biscuits.

How long does Corn Syrup last? Does Corn Syrup Go Bad?

Like most liquid food items, corn syrup is the best ingredient to use as per date available on the label.

But still, it is an option that has a long life.

To keep corn syrup for an extended time, keep lid of the jar tight after each use.

Ensure that syrup is away from direct contact with sunlight.

Even after the expiry of Corn Syrup, you can use it if you do proper inspection and smell testing.

The date mentioned on bottles is just one that indicates that syrup is best to use before the date, but in no way it means that it cannot be used after that.

After some time, there might be a change in the color of the syrup to yellow, but still, the food item is edible.

You can add ingredient while making various food items.

No, Corn Syrup does not go bad in any situation.

But if we discuss facts in detail, every food item gets spoilt after a specific time.

Leaving the syrup bottle open for an extended period increases the chance of it being not good.

After a long time, there is a growth of bacteria and molds in a bottle of syrup.

How to tell if Corn Syrup Has Gone Bad?

In rare conditions, corn syrup goes bad for you.

Still, a person should have a clear idea of how they can ensure that it is no longer a good option for use.

Mainly the reason for turning bad syrup is not proper storing of syrup.

  • Cloudy Bottle

Having cloudiness or haze on the bottle will act as an indication that there might be a growth of molds on the bottle.

Such a situation is noticed in bottles when gap is there in cover and moisture gets into it.

Throwing the bottle will be the best option if it turns out cloudy.

  • Fermentation

Fermentation usually occurs with purchased corn syrup.

There is fermentation noticed as and when food particles enter syrup.

With time it will lead to the formation of bubbles in the bottle.

Stop the use of syrup after fermentation as it is now not a healthy option.

  • Foul Smell

Even after going through the smell of corn syrup, an idea can be formed regarding its quality.

At a time when you notice alcohol, like the smell of syrup, then it will be the best time to prohibit the use of syrup in the future.

How to Store Corn Syrup?

There are no special conditions required for storing corn syrup.

If you keep some basic things in mind, then you will surely get long life of syrup.

  • Storing corn syrup affects the life of syrup. Store it in a sealed containers at room temperature.
  • Keeping syrup in a refrigerator is an advisable option.
  • After using syrup, tightly seal it to avoid further spoilage or leakage.
  • Choosing a kitchen or place that is away from the reach of sunlight will be a great choice.

If you store syrup safely, then they do not spoil shortly.

But in any case, if the smell turns bad or you see contaminants, then discard syrup from further use.

Avoid keeping syrup in the refrigerator as it will change the texture of the syrup, and there will be no increment in the life of syrup.


Corn Syrup is an advisable option for making various dishes, including cake, chocolates, and other sweet dishes.

Ensure you keep the jack sealed for good quality and long life.

Some people even use this syrup as a dip for dishes and snacks; it doubles the taste of dish.

An idea can be formed of bad corn syrup by analyzing complete texture of the syrup.

If complete syrup has a dense look, then keep using it.

If you notice a liquid layer on the top section and the bottom side is dense, throw the syrup away.

How long does Corn Syrup last? Does it Go Bad?

Curious about the longevity of corn syrup? Discover how long you can expect corn syrup to remain usable and whether it has a tendency to spoil.
5 from 1 vote
Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 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.
Keyword How long does Corn Syrup last
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