Dry vermouth

[tall sarah]

How long does it last? Is 5 years (opened) ok? Should it have been refrigerated? I only need 2/3 cup for cooking with it & don't want to buy a new bottle or use a cup of white wine instead (that, I prefer to drink).

Thanks.

[Robert Lauriston]

I've never had long-opened vermouth turn to vinegar or even taste bad.

Interesting question how it differs from a fresh bottle. I'll try to remember to compare next time we're running out.

[Up With Olives]

Old/poorly stored vermouth is one reason your Manhattan or martiini may taste off or odd in a bar that doesn't use vermouth often.

[HaagenDazs]

ANY wine should be refrigerated after it's opened. I'm amazed at how many people don't know that.

We're not talking about port, BTW. That will last for quite a while unless it's a vintage bottle.

[zin1953]

Porto, too, will lose aromatics -- especially older Tawny Porto or Colheitas. About the only thing I've found that doesn't suffer from being open over an extended period of time is Madiera.

[zin1953]

Opened for five years and not refrigerated? Throw it away!

If you won't drink it, don't cook with it.

[fafner]

Vermouth will oxidize once opened. An open bottle will go bad after 2-3 months tops. An open bottle in the fridge will last probably 8-10 months. If you are just using to cook it it could be ok, but will probably have a slightly off flavor.

[Sacto_Damkier]

If is has been opened and not refrigerated, it is likely flavored vinegar. Depending on the recipe, you can probably find a cheap vermouth that will taste much better than the old stuff. White wine may work, again depending on the recipe.