4 February 2020 Whole Wheat Flour Grinding wheat. Posted on February 4, 2020 by Durgan 4 February 2020 Whole Wheat Flour Grinding wheat. 4 February 2020 Whole Wheat Flour Grinding wheat. The Wondermill is used to make whole wheat flour. Th grains are simply dumped in the hopper and in a very few minutes flour is produced. I grind it as needed so it i always fresh. It is truly a marvelous machine.