Question: chicken bouillon
By: sharon aiello
Published: September 11, 2010

what to do if chicken bouillon powder hardens

Answers:
Curt

Throw it away and never buy it again.  Buy chicken base that comes as a paste in a jar or plastic tub.  You want to buy one that 'chicken' is the first ingredient...one that is low sodium and one with NO msg.  FYI - the rock hard bouillon cube will soften in warm water.
Chris Paulk

You probably did not tighten the lid very well. You can microwave it for a second or two to soften it and add water. In most grocers -in the soup area, you can buy a small 4 pack of real chicken stock in what almost look like a juice carton. They are about 1 cup each. I keep a 4 pack around for small stuff.
Sheri Wetherell

i keep a 6 per pack and store it in dark room temperature.  Inside the cupboard.  If it hardens, I throw it away and get buy a new one.