Ageing Your Coffee
Coffee principally ages through de-gassing. This is a process where some of the carbon dioxide gas inside the bean escapes into the bag (that’s why they get so puffy!). This transformation changes how you need to approach extracting the coffee to get the best result.
A super fresh coffee will have heaps of CO2 in there, leading towards an under extraction. The word we use for this in geek circles is ‘insoluble’ meaning it’s hard for the water to dissolve the good stuff inside the coffee.
Conversely, if you’re using old coffee there won’t be much gas left, making it easier for the water to pull the flavour out (more soluble!), but potentially resulting in over extraction. If we go back to the tomato analogy, super fresh coffee may be seen as a firm underripe tomato, and your older coffee may be likened to a squishy, overripe tomato.
The best way to age your coffee gracefully is to nail down your ordering cycle. In an ideal world you want to be using your coffee between 7-21 days after roast, giving it a chance to degas without getting too old. Some baristas will prefer a more specific window within that period which is totally fine too. Getting your ordering down pat can take a bit of practice but feel free to ask the customer service team for some help if you need it! If you do end up with coffee that is a little younger or older, you can still tease the best flavours out of it by using your newfound knowledge about solubility…
If a coffee is young and insoluble, you need to increase extraction to get all the flavour out. You can try dosing down by 0.5-1g, fining your grind or upping your yield by 2-3g to get to that point – a bit of trial and error never hurt anyone! If you’re working with coffee that’s a little old, dosing up by 0.5-1g, coarsening your grind, or dropping your yield by 2-3g will help you out too. Happy brewing!