Depending on the size of the pan you use, the baking time will vary from 20 to 35 minutes. Test for doneness with a toothpick. The donuts will be dense but you should see crumbs on the toothpick just as you would with baking a traditional cake.
Cool completely on a wire rack.
Whisk together all of the ingredients for the glaze adding powdered sugar until you reach the correct consistency. Drizzle over the donuts.
In a small bowl, add the cinnamon and sugar. Stir to combine and sprinkle over the wet glaze