Keep beans airtight and cool
To preserve your beans’ fresh roasted flavor as long as possible, store them in an opaque, air-tight container at room temperature. Coffee beans are decorative and beautiful, but avoid clear canisters which will allow light to compromise the taste of your coffee.
Keep your beans in a dark and cool location. Remember that a cabinet near the oven is often too warm, and so is a spot on the kitchen counter that gets strong afternoon sun.
The urethane foil coffee bags in which you purchased your coffee are generally not appropriate for long-term storage. Ideal coffee storage canisters with an airtight seal are a worthwhile investment.
Buy the right amount
Coffee begins to lose freshness almost immediately after roasting, so it is far better to purchase it in smaller quantities. Buy freshly roasted coffee frequently, and buy only what you will use in the next one or two weeks.
While there are different views on whether or not coffee should be frozen, the main consideration is that coffee absorbs moisture – and odors and tastes – from the air around it. As mentioned above, most home storage containers are not truly airtight, which is why food stored a long time in the freezer can suffer freezer burn. Therefore, if you do freeze your beans, it is critically important to use a truly airtight container.
If you freeze your coffee, quickly remove as much as you need for one serving and return the rest to the freezer before any condensation forms on the frozen coffee.