If you've bought coffee from a grocery store, you've probably noticed the bags don't say when the coffee was roasted. There's a best-by date, sometimes. A roasted-on date, rarely. That absence is worth understanding.
What happens after roasting
Coffee is a perishable product. Not in the way that milk goes bad, but in the way that flavor degrades — gradually, then noticeably.
When coffee is roasted, it releases CO2, which acts as a natural barrier against oxygen. For the first few days after roasting, the coffee is actually too gassy to brew well — this is why specialty roasters recommend waiting 24 to 48 hours before opening a fresh bag. After that, a window opens: the coffee is at its best, balanced and full of what the roaster intended.
Then oxidation takes over. The aromatics that give coffee its character — what you smell when you open a bag, what you taste in the first sip — begin to break down. After a few weeks without proper sealing, the difference is real. After a few months, the coffee is flat. Not bad in the way that spoiled food is bad, but noticeably dull.
What the roast date tells you
A roasted-on date is the most useful piece of information on a coffee bag. It tells you how much of that post-roast window remains.
Grocery store coffee typically doesn't include one because the supply chain doesn't support it. Coffee moves from roaster to warehouse to distributor to shelf — that process can take months. By the time you buy it, the question of freshness is already settled.
Roasted-to-order coffee starts from a different position. The coffee is roasted when your order is placed, not before. It ships within 48 hours. The window is open when it arrives, not closing.
What freshness tastes like in practice
Fresh coffee smells different before you brew it — more immediate, more aromatic. The difference is easiest to notice in the bloom: when you pour hot water over fresh ground coffee, it releases CO2 and expands noticeably. Older coffee blooms less, or not at all.
In the cup, fresh coffee tastes cleaner. The flavors are more distinct. The finish is clearer. Coffee that's been sitting loses brightness first, then body, then the distinction between one coffee and another.
None of this requires you to be a coffee expert to notice. Most people who switch from shelf-stable grocery coffee to roasted-to-order coffee notice it in the first bag, without being told what to look for.
The practical version
River Moon roasts to order and ships within 48 hours. Every bag includes a roasted-on date. If you receive a bag and want to verify freshness: open it, smell it, and check the bloom when you brew. Those three things will tell you more than any label.
