Heat vegetable oil to 350 degrees F in a dutch oven. Use a candy thermometer to keep a consistent temperature throughout the process.
While the vegetable oil is heating up, prepare biscuit dough by using a knife to cut a circle in the center of each biscuit. Set aside.
Next combine pumpkin spice and granulated sugar in a bowl. Mix and set aside.
Once the oil reaches 350 degrees F, fry donuts for 1-2 minutes each side until golden. Fry in batches, so you don’t overcrowd the pan. I did mine 3 at a time.
Cool donuts for ~1 minute. Coat each with the pumpkin spice sugar from step 3. I would try to coat the donuts while they're still hot, so the pumpkin spice sugar sticks better.