I know a lot of members here are in Finland so I figured I'd share this event here (sorry for the FB link but that's all I've got). Mika Laitinen (of brewingnordic.com and author of Viking Age Brew) is giving a traditional sahti brewing demo/course on Saturday April 24
Here's what he wrote on FB about it:
I'm giving a course on brewing sahti and other ancient ales on Saturday, April 26. Bircalaiset organizes the course in Pirkkala and is also open to those who aren't members of this Iron Age society.
It will be a practical one-day hands-on course where people brew their own sahti or ancient ale in small groups. Handling farmhouse yeast such as kveik is a special theme of this course. I have learned a lot of new things about these yeasts in 2024-2025, although I have used Norwegian and Lithuanian farmhouse yeasts since 2015. Of course, you'll also learn to brew a tasty high-gravity sahti and flavor it with juniper, hops, and other ancient beer herbs.
It's not illegal in the US for homebrewers, it would be for a commercial brewery (though they can buy vanilla extract which uses alcohol for the extraction and use that with no issues), in reality no one is checking this stuff and there's probably a lot a commercial brewery can get away with that is technically illegal, just put spruce tips on the label, no one cares/asks how it was extracted.