And what happens if you leave it out?

Mayonnaise is a condiment with a complex reputation.

On the one hand, this rich, tangy spread can elevate any sandwich or salad.

a photo of a jar of mayonnaise

Photo: Getty Images

But it says on the package to refrigerate after opening.

So, does mayo really need to be refrigerated or not?

The answer is a frustrating yes, and no.

But the jarred stuff?

Here is where the caveats come in.

Be sure to read the package directions very carefully before opting for pantry life for your opened mayonnaise.

And if you see any mold or color changes, or smell any off odors, discard immediately.

Common Questions

How Long Can Mayo Be Unrefrigerated?

Do not store it over or near any appliance that can create heat, especially a stove.

What Happens When Mayo Is Not Refrigerated?

Why Do Restaurants Not Refrigerate Mayo?

Does Hellman’s Mayonnaise Have to Be Refrigerated After Opening?

Most Hellman’s products say to refrigerate after opening, with the exception of their squeeze bottles.

What About Other Mayonnaise-like Products?

Always follow package directions when it comes to food storage.