Preheat your oven to 350°F, and prep your large doughnut pan by spraying with a non-stick spray.
In the bowl of your mixer, combine together the flour, sugar, ginger, and salt using the paddle attachment on medium speed.
Add the vegetable oil to the dry ingredients, and mix until combined. It will look like fluffy beach sand. Take 3/4 Cup of this mixture out of your mixing bowl and put it to the side.
With the mixer on the lowest setting, add in the baking powder, vanilla, hot coffee and molasses (see notes about measuring molasses). Mix until combined. Scrape bowl. Mix again until all of the lumps are gone. Transfer batter to a glass measuring cup with a spout for easy portioning.
Using half of your batter, pour into your doughnut pan, and fill each mold until 3/4 of the way full.
Use half of the mixture that you reserved earlier, and sprinkle on top of the batter that you have already portioned out into your pan.
Bake for 15-17 minutes, turning halfway though. They should spring back slightly when touched.
Once baked and cooled, depan doughnuts and then refill your pan using the last half of your batter. Sprinkle the remaining mixture that you had reserved on to your second batch of doughnuts. Bake your second batch for another 15-17 minutes.