Moar cookies? A 10-gallon batch of oatmeal stout can probably take care of a couple pounds.
Certainly not a primary ingredient in beer.
There are some historical recipes which use oat malt as the major grist ingredient, but non-mashed oats aren't easy to use. They're full of fats and oils and stuff which, when used in relatively small proportions, add a lovely silky character to the beer. Used much beyond 20% and they'll present significant difficulties with lautering, not to mention the beer will be a cloudy, oily mess that won't taste very nice at all.
It's a shame, but ... check with your local homebrew club. Maybe you can rid yourself of it in smaller proportions.
Cheers,
Bob
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