Firstly, Mill your flour, I like to use half soft white wheat & half spelt.
Preheat oven to 350*F, and spray your donut pans wit non stick cooking spray.
Then, put melted butter, oil, sugars, eggs, vanilla, kefir, and milk in a mixing bowl, and stir until incorporated.
Add the cocoa powder, baking powder, baking soda, and salt to the fresh milled flour, and whisk together.
Then, add the dry ingredients into the wet ingredients, and stir to combine, until it is smooth, but not overmixed.
Fill the donut pan holes about 2/3 full, and bake on the center oven rack.
Bake for 12 to 14 minutes for the 3 inch donut pans. (bake mini donuts 7-8 minutes, and donut holes for 14-16 mins.)
Test doneness with a toothpick, and make sure it comes out clean.
Remove pans from oven, and allow to cool for 10 minutes in the pan. Then, carefully turn pans over to remove the donuts from the pan.
Transfer donuts to a wire rack to allow to cool completely (about 20 more minutes) before adding a glaze or powdered sugar.
Make optional glaze and dip each donut in and place back on wire rack, or roll in powdered sugar, or dip in chocolate, or even eat plain just like this!