what is the best way to store ground coffee to keep fresh

[peppers]

i put it in a ziplock bag and then sucked out all the air with my mouth to great a vacuum environment. but after a while it let a bit of air in. probably not the best way.

 

[jlyon10]

The best way to enjoy coffee is fresh, so roast it yourself, let it rest for a couple of days and then grind only enough to make what you will drink.

 

[GVDub]

Simply put, there is none. Once ground, coffee has about 15 minutes of life before enough of the flavor components are oxidized that it is merely a ghost of its former self. Whole beans stay reasonably fresh for about 15 days after roasting, so, as stated above, the best option is to buy fresh roast, grind as needed, and use within two weeks.

 

[Ellie]

Agreed that it's best to store as whole bean (rather than ground) and use the beans within 15 days or so. But there are times when the coffee is ground (for whatever reason), and you are just not going to be able to use it right away. I know this is hotly debated, but IMHO you can stall off the stale taste if you package the coffee in a good airtight container and put in the freezer. There, I've said it...bring on the naysayers!

Ellen