Combine dry ingredients. Separately, combine wet ingredients. (I didn’t use a whisk since there was no egg here, but I recommend one. Oil doesn’t mix well!) Stir the wet ingredients into the dry until well combined. Divide among 8 well-greased donut cups. Bake at 350F for 15-20 minutes. Let cool briefly, then carefully invert the pans to remove the donuts; avoid trying to pry or pull them out, as the donuts will tear.
While the donuts cool, combine the wet ingredients for the glaze. Stir in powdered sugar until well combined. I like my glaze thick; add more milk if you want yours thinner. The donuts are too fragile to dip into the glaze, so drizzle it over the cooled donuts. Top with nuts if desired.