Why does coffee start to disintegrate?
Whether it’s light, moisture or age, the flavour of your coffee can really start to wear away as soon as it is purchased.
These external aspects can stale the coffee, and on top of this, humidity and temperature changes could even encourage mould to grow.
On top of this all, coffee starts trying to destroy itself by releasing CO2. Whenever coffee beans are roasted, the heat causes carbon dioxide to become trapped in the bean. When ground, this by-product starts to escape even quicker, and if there is too much CO2 present in the coffee when hot water is used on it, it distorts the flavour.
This is why both an airtight jar and a CO2 release valve are vital if your coffee is at its freshest.
Is it best to store coffee as grounds or beans?
Obviously this depends on your coffee making process. If you home grind your beans, then keeping them in their most natural state (the bean) is best because once they are ground, their shelf life starts to lower.
But if home grinding and roasting is not for you, there is plenty of pre-ground coffee out there available in different sizes, depending on the machine you’re using. As mentioned above though, don’t store too much at once as it could mean more work looking after it.