I ground my own almond almonds in a food processor. They came in a bag as Naturally Sliced. What they mean by "naturally" I don't know. But I was concerned the homemade flour wouldn't be as good as the prepackaged flour. I checked the consistency and they were pretty much identical. The only difference was that my flour had brown flecks in it (from the outside of the almonds). The prepackaged (and very expensive) almond flour was just all yellow.