Look at the bag of coffee in your kitchen right now. Find the "best before" date. Now look for the roast date. If you can't find one—that's the problem.
What Happens to Coffee After Roasting
Roasting transforms green coffee beans through a complex series of chemical reactions—the Maillard reaction, caramelization, and the development of hundreds of aromatic compounds that give each bean its character. The moment roasting ends, a clock starts.
In the first 24–48 hours after roasting, freshly roasted beans off-gas CO₂ rapidly. This is why some roasters recommend waiting a day before brewing—the gas can interfere with extraction. But from day three onward, the real degradation begins.
Oxygen is the enemy. Exposure to air triggers oxidation, which flattens the aromatics, dulls the brightness, and turns what could have been a vibrant, complex cup into something generic and slightly cardboard-y. Light and moisture accelerate this.
The Peak Flavor Window
For most roasts, the peak flavor window is roughly 7 to 21 days post-roast. This varies by roast level and processing method:
- Light roasts: Peak at 10–21 days. The delicate floral and fruit notes are fragile and degrade fastest.
- Medium roasts: Peak at 7–14 days. More stable than light roasts, still best within two weeks.
- Dark roasts: 5–10 days. The heavier roast provides some short-term protection, but dark roasts also stale fastest once opened.
After 30 days, most coffee is noticeably less interesting. After 60 days, you're essentially just drinking hot brown water with caffeine.
Why Most Brands Hide the Roast Date
The "best before" date on commercial coffee bags is typically 12–24 months after packaging. This is a shelf-life date designed around storage stability—not flavor. It tells you the coffee won't make you sick. It tells you nothing about whether it tastes good.
Large-scale brands roast in enormous batches, warehouse for weeks or months, ship through distribution networks, and land on supermarket shelves where they sit for weeks more. By the time you buy it, that coffee might be 4–6 months post-roast. The "best before" date of 2026 is technically accurate. The "tastes great" date was last autumn.
"If a brand won't tell you when their coffee was roasted, that's a marketing decision. It's not an accident."
How to Use This Information
When buying coffee, look for the roast date—not just the best-before date. Specialty roasters will print it clearly because it's a point of pride, not a liability.
Once you have fresh beans, store them properly: an airtight container, away from light, at room temperature. Don't freeze unless you're storing for more than a month and sealing portions airtight. Don't refrigerate—the moisture and ambient odours do more harm than good.
Buy smaller quantities more frequently rather than a large bag you'll nurse for two months.
What We Do Differently
Every bag of Bean There lists the exact roast date. We roast in small batches—never more than what we can ship within 72 hours. By the time the bag is in your hands, the coffee is typically 3–5 days post-roast. You get the full window.
We think this should be the industry standard. For now, it's just ours.
Nadia Osei
Co-founder, Bean There
Nadia is a food scientist turned coffee entrepreneur who believes what you put in your body should be something you understand, trust, and genuinely enjoy.