Ty520
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We used to have some Korean friends who gave us roasted barley tea. It was very nice. I don't think they used malted barley, and anyway it wasn't fermented. It had a very nice flavor, so I think that roasted barley wine might be good, even without malting or adding amylase enzyme. The barley would contribute flavor, but not sugar. OTOH why not add some amylase enzyme as well?
@BigDaveK When you add amylase enzyme, how do you measure OG? Do you let the enzyme work first, then measure OG?
I found this article: How to Use Amylase Enzyme - Beer Snobs Apparently the amylase enzyme works best around 150 degrees F. Several articles recommend holding the mash at the correct temperature for 1 hour. There is also alpha and beta amylase. It seems like most people are using alpha.
for reference, barley has a max theoretical (important word to remember) potential of about 25 points per pound per gallon (most other grains are around 30-35 ppg), so when trying to put together your recipe, that should give you a base line to know what gravity you could possibly expect - but then you have to factor in the fact that extraction of sugars from grains, whether through mashing or enzymes, is never 100% efficient...i doubt you could get anything more than 80% on a perfect day.
Alpha is pretty easy to acquire at home brew shops, but I've never had any luck getting beta.
I have no idea how it would affect grains other than rice, but another interesting option to try would be Yellow Label Angel yeast used for making kojii, which doesn't require heat.
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