Those made in the U.S.:
Brocho before eating this: Borei Pri Ha'adama
Brocho after eating the proper shiur of this: Borei Nefashos
Source: Star-K Cereal List
Those made in Canada:
Brocho before eating this: Shehakol Niyeh Bedvoro
Brocho after eating the proper shiur of this: Borei Nefashos
Source: Kashruth Council of Canada