Matcha powder is a very delicate and sensitive product. Please do not leave an open bag of matcha powder on your kitchen counter – when exposed to elements such as heat, air, moisture, or light, matcha will lose its flavor, freshness, and color within days.
Unopened matcha bags will last about one year if kept in a cool and dark environment. After opening the bag, it should be used within two months.
The best way to keep your matcha fresh after opening is to store it tightly sealed in a cool, dark and dry place, ideally in your fridge. Make sure it’s always tightly sealed, not to get wet. We also recommend allowing it to come to room temperature before opening the container.
Another tip for the matcha bags is to transfer small amounts of your matcha powder to a smaller air tight container for daily use, store that smaller container in the fridge, and keep your large bag tightly sealed in the freezer for longer term storage. Freezing is an acceptable way to store matcha that you think you won't use for a while. Check out Handmade Japanese Washi Paper Tea Canisters here.