Hi. I want to increase the bulk of my bread without adding too many calories and after some googling I foundoat fiber powder which is made from oat hulls. Is powdering these with a standard mill or a food processor possible? I live in Ireland where no one seems to be selling anything like this but I can get massive amount of oat hulls from a local mill.
Sorry, couldn't resist the Prarie Home Companion reference.
To your question: powdered oat hulls are used as a fiber source for human foods. I'm not sure how they are processed, but would think that something like a coffee mill might reduce them to a powder fine enough to not be gritty. A food processor might leave them objectionably coarse.
Run a test and let us know how it goes.
Paul