Multigrain cheerios contain a lot of stuff other than oats (corn, rice. etc). It’s possible that the brocha acharona is actually borei n’fashos even if the brocha rishona is mezonos.
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Multigrain cheerios contain a lot of stuff other than oats (corn, rice. etc). It’s possible that the brocha acharona is actually borei n’fashos even if the brocha rishona is mezonos.