What beracha rishona and acharona are said on mushroom barley soup?
Answer:
If the barley is the primary ingredient in the soup, the bracha would be Mezonos and Al Hamichya. If there is only a minute amount of barley a bracha would be said on the barley [mezonos] and on the soup [shehakol].
Sources:
See MIshna Brura 205:11.