another_jim wrote:Maybe Abe isn't worried, but I stick by advice to not unseal frozen beans until they hit room temperature.
I admit this is based merely on logic, rather than direct experiment. from How to defrost frozen coffee beans
Time for 'speriment
3 125g identical jars of frozen familiar espresso coffee from the same batch.
Bottom marked to be identifiable later, but not identifiable when viewed normally.
Remove 1 jar several hours ahead of the other 2 to allow to come to room temperature.
Open 1 of the frozen jars and remove 1 shot worth of beans. Repeat 2x @ ~20 minute intervals. [discarded]
Remove 1 shot from the previously defrosted jar. Repeat 2x @ 20 minute intervals. [brewed]
Set aside all 3 jars for 3 days.
Remove 3 shots from the previously unopened jar to equalize volume.
Enlist assistant to mix up the jars.
Sniff test each of the jars.
The missus : "These two smell like coffee. This one smells like WD-40."
I had the missus single dose charge the grinder from the 3 jars [we used a ½ shot purge] so I didn't know what coffee I was brewing. [Brew ratio did not vary significantly, ~150%]
Two shots lacked sweetness and had a musty nut after taste that lingered in the middle back of the tongue.
Turns out these 2 shots, of 6 tasted, were from the jar opened while frozen.