that link returns a 404 error for me
taking this opportunity to not double post and comment on your post as well
don’t remember where I heard this from, was a long time ago (perhaps during some sort of botany class or another) but hop compounds should exhibit some surface tension action (like what soap does to water), so that might be the explanation for the foam
christmas-y cider sounds awesome.
edit - ninja’d on 404 comment - ignore that part
Did a raw ale with heather tips foraged from the forest that turned out pretty good.
And now fermenting a raw pumpkin ale. Added around 3 kg pumpkin mash to the mash. A bit difficult to work with and had an OG of around 1.055, bit on the low end there. Fingers crossed it’ll be drinkable. Assuming it’s going to come in at session strength.