Place the rice in your grinder and grind for about 15 seconds or until nice and fine like flour. Most grinders won’t be able to fit the full 2 cups of rice, so just do it a bit at a time.
If desired, sift the flour to ensure no little chunks of rice remain behind.
Store in an airtight container, in a cool, dry area for up to 5 months (sometimes longer).
Notes
Tips for Success
I don’t personally wash the rice before grinding since it’s used in baking and cooked at high temperatures, but you can rinse it if you prefer—just be sure it’s completely dry before grinding.
There’s no need to soak the rice when using a spice grinder; it’s powerful enough to grind dry rice easily.
Medium-grain white rice also works well, and brown rice can be used if you want to make brown rice flour.
Most food processors won’t grind rice finely enough to make flour unless they have a specialized milling setting.