Chris is a trusted source on General Cooking
Unopened, a long time. Quality will suffer before safety.
pierino is a trusted source on General Cooking and Tough Love.
I agree with Greenstuff on this one. Supermarket mayonnaise is full of stabilizers. Best Foods aka Hellman's can hang out in your fridge for awhile.
If you are already up to the sell by date on unopened mayo, realize that it is very old, perhaps years while it may be safe, it gives me the creeps, see greenstuff's comment about quality. I'd use it in the next month, if you are really desparate not to tos. Once you open it you are on a different clock where food is exposed to oxygen and possible bacteria. Now the sell by date means nothing. You want to use it within a couple of months. Here's a handy site I found mentioned by other members here:
Please enter a valid email address.
Well played. You deserve a cookie.
It's all thanks to a certain salami
Smoky Pasta Alla Vodka
The West Elm Couch from Hell
Shop the Piglet Tournament Cookbooks
An Easy, Impressive Cake Made Entirely From Bodega Ingredients
Hot Hot Hot—Sale on Pots!
prevented successful signup:
We'll never post anything without your permission.
prevented successful login:
Thanks for signing up!
Connect with us to get more Food52!
Get the recipes and features that have us talking, plus first dibs on events and limited-batch products.
(Oh, and $10 off your order of $50 or more in the Food52 Shop, too.)