Cut a hole in the biscuit dough. Ideally you would use a circle cookie cutter, I used a small round Tupperware container for this. Don't forget to save the insides for donut holes!
Heat oil in a skillet on medium heat. DO NOT OVERHEAT!
Using heat proof tongs, gently place each donut in the oil. Fry for a few minutes on each side, until golden brown.
Remove donuts from the oil and arrange a paper towel to cool for several minutes. While they are still warm, dip each side in pumpkin spice/sugar mixture. Drizzle with cinnamon glaze if desired.
To make the cinnamon glaze, Mix powdered sugar, milk, and ground cinnamon together with a small whisk or fork. Drizzle over warm, fresh donuts.