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Purchase a package of organic brown rice. Add a small portion of rice to a blender or food processor. Pulse the rice to break up the large grains. Grind the rice to a fine powder.
All-natural types of rice are best, as these haven't been treated with preservatives or any other substances that may change the behavior or the four when it's used for cooking. To produce large quantities of flour, you'll need to pick up a bag of rice that's about one pound or bigger. If you only need to make a little bit, a smaller bag or canister should be enough.   Do not cook the rice before processing it. It needs to be dry in order to grind properly. Avoid rices with flavors or any other additives. Pour in the rice and place the lid securely over the top of the blender. Only use 2-3 tablespoons at a time—if the blender is overcrowded, the blades may will have a difficult time grinding the rice grains.  Most smaller blender will only be able to effectively manage about 1.5 cups of rice at a time. Making your own brown rice flour at home can be time consuming, but it's worth it when you consider how much you stand to save by skipping the grocery store. Starting on a low power setting, start and stop the blender a few times in quick succession. This will help reduce the grains to a smaller size without causing the blades to jam or overheat.   In addition to a standard blender or food processor, you can also use a compact unit, such as a VitaMix or Magic Bullet. These single-use blenders are perfectly suited for processing small amounts of ingredients. If all else fails, a coffee grinder will also get the job done. Once the grains have been broken down a bit, switch the blender to a higher power setting and continue blending in 10-20 second intervals. Be sure to pause every now and then to give the motor a chance to cool off.  Rice flour needs to be very fine in order to produce the right effect in culinary recipes. By the time you're finished, the processed rice should contain no whole grains or coarse chunks. When left to run continuously for too long, the blender can easily overheat. This can cause it to become a potential electrical hazard.