Question: How Long Can You Safely Keep Homemade Chicken Stock In The Freezer?
By: Bunkycooks
Published: January 12, 2010

I usually use my stock within 6 months so I do not worry.  Will it stay good for a year?  I have heard that it should be okay, but it may loose some flavor at that point.

Answers:
Melissa Peterman

Hi Gwen!
I recommend using frozen chicken stock within 6 months. I definitely feel the flavor and overall quality deteriorates after it is frozen for much longer.
Darren Vengroff

Depends how well it is sealed. I've used vacuum packed frozen stock up to a year later and had no problems. I mostly use it in less time than than, but occasionally I stumble across an old batch at the bottom of the freezer. 
I freeze it in 2oz blocks in a muffin tin, then pop them out and vacuum seal them in plastic.