1. Wash the rice and cover with at least 3 inches of water. Soak for at least 5 hours or overnight. 

2. Strain the rice using a sieve and let it drain for at least 30 minutes. 

3. Using a food processor, grind the soaked and drained rice as finely as possible. 

4. Grind a second time using a high powered blender, like a Vitamix, to get a finer grain. Blend about 1 to 1 1/2 cups at a time to prevent the rice from getting stuck. 

5. Pass the flour through a medium holed sieve. Grind any big pieces that don’t pass through the sieve again with the blender, and pass through the sieve. 

6. Use the flour right away, or keep in an airtight container in the fridge for 1 week or the freezer for 3 months. Bring to room temperature before using.