Our Coffee Resting Philosophy
Resting Light Roasted Coffee
At HYUNAH Coffee Club, we work exclusively with light and ultra light roasts. They are expressive, complex, and often the truest reflection of a producer and roaster's intent. They are also dramatically different from darker coffees in one important way: they need time to rest. Resting is an essential part of unlocking a coffee’s depth, clarity, and sweetness.
Most specialty coffee enthusiasts already know that fresh coffee releases carbon dioxide after roasting. What is less commonly talked about is how the structure of the bean evolves during this period. Light roasts have stronger, less brittle cell walls and a tighter internal structure. This means that they naturally take longer to open up. Many of the world’s best roasters now treat resting not as an optional step, but as part of the coffee’s natural development curve.
HYUNAH’s Resting Philosophy
Most light roasts need at least 3 to 4 weeks to reach their full potential. At HYUNAH, we generally prefer our coffees between weeks 5 and 8 (many can even continue to improve well beyond that). Some of the most respected fourth-wave roasters feel the same. Joaquim Morceau, widely regarded as one of the best roasters and baristas in the world, roasts extremely light and regularly recommends enjoying his coffees through week 12. We find we enjoy his coffees from weeks 5 through 14.
This is why you may see older dates on some of the coffees we sell. It's intentional and quality driven, and the best way to share the coffee at its peak.
Not simply fresh for the sake of freshness.
This is also why we transparently list the roast date of the coffee you are purchasing. Enthusiasts (our customers), can clearly know what they are going to receive, and can purchase their coffee based on when they want to drink it.
What Happens As Coffee Rests
A few important things are happening inside the bean as it moves away from the roast date.
- Degassing slows and stabilizes. In espresso, excess carbon dioxide creates uncontrolled crema and limits extraction. In filter, it can interrupt flow and clarity. Once the gas settles, the coffee becomes easier to work with and is in a state to be more expressive.
- Flavor integration increases. Acidity rounds, sweetness deepens, and clarity improves. Aromatics become more pronounced and obvious.
- Brewing becomes predictable and forgiving. Rested coffees respond more consistently to grind size, temperature adjustments, and flow rate.
In our recently HYUNAH x PLY collaboration, we worked on a washed geisha from Carmen Estate in Panama. When we first received the final roast, four days after roasting, it smelled burnt, ashy and quite frankly unappealing. By week 3, it smelled light nothing, very difficult to pick out any aromatics at all. In the days after, it was clear the coffee was starting to open up, and by week 4, it smelled like a beautiful botanical scent you’d want to capture as a perfume. Wild.
Why Ultra Light Roasts Benefit Even More
Air roasted coffees, especially those roasted on a Loring, often require longer resting periods. This has become an accepted pattern across the industry. Scott Rao, one of the leading voices in coffee roasting, notes that Loring roasted coffees tend to peak later than coffees roasted on classic drum machines. The reasons likely relate to the machine’s pressurized and low oxygen environment, which strengthens the structure of the bean and slows the development curve.
This is one reason why many of our featured roasters prefer to rest their coffees for several weeks, sometimes much longer.
How We Brew Older Coffee
Of course, at a certain point, the coffee passes its peak and starts to slowly decline.
As light roasted coffee ages past 8 and 9 weeks, we make a few thoughtful adjustments to continue to get good results. These are not a holden set of rules that will always work, but more so a few practices to help.
Filter
- Brew at a lower temperature
- Use a coarser grind size
- Shorten the bloom time
Espresso
- Brew at a lower temperature
- Grind slightly finer as the coffee ages, or, increase your dose to maintain your preferred grind size
- 49mm baskets with deeper pucks are especially helpful