How do you  make coconut flour at home?
 1 What you will have left after you make your coconut milk is a wet-ish pulp. 
2 Break up the large clumps of coconut pulp and make sure to spread the pulp out evenly on the tray. 
3 Put the tray in a 170 degree F. oven on the center rack for 4 hours. 
4 After 4 hours, your coconut pulp should be completely dried out, but should not have any. But you can put the pulp directly on to the sheet tray if you prefer. 