How Long Do Marshmallows Last?

How long do marshmallows last? Marshmallows last for 6-8 months beyond their "best by date", getting slightly stickier as they age. The shelf life of marshmallows depends on the best before date and how they are stored.

The marshmallows base comes from mallow root sap, which was originally used as a medicine for sore throats.

Marshmallows are generally made from mallow root sap, whipped egg whites and sugar and then they are coated in corn starch to keep them from sticking to each other. They come in different shapes and sizes and now even in colors to coordinate with the different holidays.

So, how long do marshmallows last? When properly stored, the shelf life of marshmallows past their best before date is approximately ...

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Marshmallows Expiration Date

(Unopened) Pantry
Marshmallows last for 6-8 Months
Marshmallow Fluff lasts for 6-8 Months
Marshmallow Peeps last for 6-8 Months
(Opened) Pantry
Marshmallows last for 2-4 Months
Marshmallow fluff lasts for 2-4 Months
Marshmallow Peeps last for 2-4 Months

But remember, like a lot of other sweets, they usually has a best before date and not a use by date. Because of this distinction, you may safely use them for your snacking pleasure or baking needs after the best before date has lapsed.

How to tell if Marshmallows are bad, rotten or spoiled?

Practicing proper hygiene and food safety techniques will help prevent foodborne illness.

It is the texture and color that will change when this product has been around too long. Marshmallows will become sticky and change from a pure white color into a light yellow color when they are going bad.

Peeps, since they are coated in colored sugar, will not change color but will become hard as they loose moisture.

There are, of course, certain health risks associated with spoiled foods so always remember to practice food safety and enjoy your foods before their shelf life has expired!

How to store Marshmallows to extend their shelf life?

The best way to store marshmallows is in an air tight container in the pantry. The original bag with a twist tie after opening works just fine.

Some benefits of proper food storage include eating healthier, cutting food costs and helping the environment by avoiding waste.

Interesting facts about Marshmallows:

  • The most popular recipe using marshmallows is S'mores, a recipe first introduced by the Girl Scouts of America in their handbook.
  • For some more modern S'more recipes, including an adult S'more shot, check this post.
  • How long are Marshmallows good for when prepared in a dish?

    How long do marshmallows last? That depends. How long does chocolate last? In general, they only last as long as the quickest expiring ingredient in the dish.

    What are our shelf life resources?

    In determining how long Marshmallows lasts, our content incorporates research 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 the shelf life of Marshmallows.

    *An important note about expiration dates...

    Although the Marshmallows 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 a replacement for your health care professional. Please eat responsibly!

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    With oven-safe glass and water-tight lids, these food storage containers are ready for action! Not a Prime Member? Try a 30-day free trial today!


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