If you've ever opened a bag of coffee and wondered how long it stays fresh, what the roast date actually means, or why people 'rest' their beans — this is for you.

Why Freshly Roasted Doesn't Mean Ready to Drink

When coffee is roasted, the beans release CO₂ — a process called degassing that continues for days, sometimes weeks, after roasting. If you brew coffee too soon after roasting, that excess CO₂ interferes with extraction. Espresso blooms aggressively and tastes sharp. Filter coffee can taste grassy or hollow, the flavours not yet settled.

Most specialty roasters know this and rest their beans before shipping — they just don't always say so. The sweet spot for most washed coffees is 7–14 days post-roast. Natural and anaerobic processed coffees often benefit from even longer, sometimes 3–4 weeks.

So When Is Coffee at Its Best?

For most coffees, the flavour window is roughly 7 to 30 days after roasting. That's when CO₂ has settled enough for clean extraction, but the volatile aromatics that give specialty coffee its complexity haven't faded yet.

We roast every Tuesday in London and ship throughout the week. By the time your bag arrives, it's typically 7–14 days post-roast — which means it arrives in that optimal window, already rested and ready to brew. Not straight off the roaster. Not sitting in a warehouse for three months. Just right.

How to Store Coffee to Keep It Fresh

Once your bag is open, the enemies are air, light, heat, and moisture. A few simple rules:

• Keep beans in the bag they came in — the one-way valve releases CO₂ without letting oxygen in.

• Store in a cool, dark place. A cupboard is fine. The fridge is not — condensation is worse than room temperature.

• Only grind what you need, immediately before brewing. Pre-ground coffee goes stale within hours.

• If you buy in bulk, freeze beans in airtight portions and defrost one at a time — they freeze very well.

• Aim to use an open bag within 2–3 weeks for best flavour.

What About the Roast Date on the Bag?

Always check roast date, not best-before date. Best-before dates on coffee bags are a legal requirement but they're nearly meaningless for quality — a coffee can be technically within its best-before window and taste completely flat.

Every Rascal bag has the roast date printed on it. If you're buying from a supermarket or a brand that doesn't show the roast date, that tells you something — they don't want you to know how old it is.

Want coffee that arrives at peak flavour every time? Our subscription ships weekly, roasted to order — so you never have to think about it.