Storing matcha: refrigerator, oxidation, humidity
Written by Dian VAULTIER·
In Brief
- Matcha is the most fragile of teas. Its contact surface with the air is immense, requiring strict storage conditions, otherwise it turns yellow within a few weeks.
- Because it is ground into a microscopic powder, matcha has a contact surface with the air far greater than that of a whole leaf.
- The expertise of the HOLLIN sommelier: matcha storage explained by a purist Tea House, with no added flavourings, based in Sartrouville (Île-de-France) and shipping its grand crus worldwide.
The Matcha is the most fragile of shaded Japanese green. Its contact surface with the air is immense, requiring strict storage conditions, otherwise it turns yellow within a few weeks.
Matcha, the most fragile of teas
Because it is ground into a microscopic powder, the Matcha has a contact surface with the air far greater than that of a whole leaf. It is therefore extremely vulnerable to oxidation, heat, light and humidity.
Poorly stored, a Matcha vivid green premium turns a dull yellow and develops pronounced bitterness within a few weeks. Colour is the first sign.
The refrigerator: a good idea, under certain conditions
Placing a tin of Matcha in the refrigerator significantly slows its ageing, particularly before opening or if it is to be consumed over several months.
Two pitfalls to avoid at all costs: condensation, which forms instantly when a cold tin is opened at room temperature, and odours, which the powder absorbs very easily.
The 30-minute rule
Always take your tin of Matcha from the refrigerator 30 minutes before opening it. This allows the tin to return to room temperature, otherwise water vapour will settle on the powder.
Also make sure that the tin is 100 % airtight and opaque. A Matcha with cheese is not on the agenda.
For everyday use, a cupboard is enough
For a Matcha consumed within a few weeks, a cool, dry cupboard away from light is sufficient, provided a perfectly airtight container is used.
In Sartrouville, we offer tins with a double seal designed for Matcha, as well as the matchas themselves in small quantities to avoid keeping large stocks.
Frequently Asked Questions (FAQ)
- Can matcha be frozen?
- Technically yes, but there is little benefit. The real risk with the freezer is condensation when opened. A cold refrigerator, with a return to room temperature before opening, is more than sufficient.
- How long does opened matcha keep?
- A Matcha once opened must be consumed within four to six weeks at most to remain at its best. Beyond that, its colour and vibrancy visibly decline.