I find a lot of medicinal things off-putting, but really liked this — it tasted like thyme with hints of rosemary to me.
Thanks to all for their help! It is apparently in the cardamom family, so various people were close by thinking it was black cardamom, 草扣 can be googled in English as Cao Dou Kou / Alpinia katsumadai / “Grass Cardamom”.
