Ok so I had this one hot a few days ago and commented on how the black base tasted strange. Then I made it as a cold brew yesterday and I did not get that strange black base taste. So I thought my cup or infuser may have been contaminated, therefore changing the taste of the tea. But I made it again today and got the same strange black tea base taste. Not strange in a bad way. Just strange as in something I have never tasted before. It kind of reminds me of a darjeeling but not quite. The Pure Aroma website says the base is China black tea. I have emailed them to see if they can be more specific on exactly what kind of Chinese tea/blend it is. I will update with results as soon as they reply.
UPDATE: here is the reply from pure aroma. I guess I was half right on the Darjeeling – happy to know that my tastes buds do work.
“Our Earl Grey blue flowers tea is blended with black Keemun from China’s Anhui province and Darjeeling from India.”