decant double magnum
How long should a mature double magnum wine breathe?
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How long should you let this wine breathe...?

Decanting mature double magnums – Ask Decanter

How long would you allow this wine to breathe either in the glass or decanter to maximise its beauty?

Jane Anson, Decanter‘s Bordeaux correspondent, replies: Decanting older wines is tricky, because often the main argument for doing so is to remove sediment, rather than to allow the wine to open up.

A wine at 30 years old can have a delicate aromatic structure that you want to preserve, rather than allow it to escape into the room; as a result, decanting for too long is not advisable.


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Having said that, Mouton 1982 is still a richly tannic, relatively young wine, and in double magnum will have retained much of its fruit and power.

Part of your enjoyment will be in seeing how the wine evolves in the decanter and glass over a few hours.

Decanting it just an hour or so before service should be enough, but take your time and observe how its flavours deepen and evolve. I wouldn’t be surprised if the wine still tastes beautiful a full 24 hours after decanting.

This question first appeared in the November 2018 issue of Decanter magazine.


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Jane Anson

Jane Anson was Decanter’s Bordeaux correspondent until 2021 and has lived in the region since 2003. She writes a monthly wine column for Hong Kong’s South China Morning Post, and is the author of Bordeaux Legends: The 1855 First Growth Wines (also published in French as Elixirs). In addition, she has contributed to the Michelin guide to the Wine Regions of France and was the Bordeaux and Southwest France author of The Wine Opus and 1000 Great Wines That Won’t Cost a Fortune. An accredited wine teacher at the Bordeaux École du Vin, Anson holds a masters in publishing from University College London, and a tasting diploma from the Bordeaux faculty of oenology.

Roederer awards 2016: International Feature Writer of the Year