It's so easy, I'm letting my 5 year old daughter make it.
First we wanted to see how the food processor did with grinding it into a soft meal.
It did okay, but it wasn't as fine as I like it.
So I brought out the Magic Bullet and
we zipped 1 cup of oats
which turned into 3/4 cup oat flour.
We keep it in an old yogurt container in the fridge, just because I keep all my flours in the fridge.
Have you tried grinding your own oat flour? It can save you a ton of money. Maybe not as much of a timesaver as buying it from the store, but it's cheaper and we always have oatmeal in the pantry. These smaller canisters are regularly on sale with a coupon for $.50.
This works for me!