I have a 7lb tub of light lme that I bought in early Sept. and kept in the fridge since. I want to use it up in a partial mash, if it is still good. What say?
I find that LME deteriorates in flavor very quickly and so I try to use it up within a few weeks. If it is free of obvious spoilage you could try using it in a porter or something else with enough going on that any minor off flavors would be covered up.