*Smaller varieties of dates will work in place of the medjool dates, although the Medjools are softer and easier to work with. I tested this cake using small dates, and it still turned out wonderful. If you don't have millet flour, you can sub 1/2 oat and 1/2 almond flour. Don't increase the amount of millet flour by subbing more for the other flours. The oat and almond flours are softer and sweeter than millet, so the cake will become crumbly with more millet flour. I use store bought oat flour in this recipe. Oatmeal blended in a high speed blender until a fine flour forms will also work.