Q. See question above – What bracha would you make? (on tincture – a liquid concentration of the marijuana plant. You just put a few drops on the tongue).

A. If the food is ermitted, Shulchan Aruch (O.H. 210: 2) rules that on tasting food, when the food is not swallowed you don’t recite a blessing, even when significant quantities are involved, such as a mother chewing food nd then feeding it to her child. (Mishna Berura ibid. 18).
Horav Shlomo Miller’s Shlit’a opinion is that even when the food is absorbed by the tongue or the palate, you do not recite a brocho.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a