01 - Combine cinnamon, nutmeg, ginger, cloves, and allspice in a small bowl. Reserve for multiple uses.
02 - Mix granulated sugar with 2 teaspoons of the prepared pumpkin spice blend in a wide, shallow bowl.
03 - Separate biscuits and punch a 1-inch hole through the center of each using a cutter or bottle cap. Reserve cutouts for donut holes.
04 - Pour oil into a heavy-bottomed pot and heat to 350°F. Maintain temperature throughout frying.
05 - Fry 3-4 donuts at a time for 1-2 minutes per side until golden brown. Cook donut holes for approximately 1 minute total.
06 - Transfer fried donuts to a paper towel-lined tray using a slotted spoon. Drain briefly.
07 - Toss warm donuts thoroughly in the spiced sugar mixture until evenly coated.
08 - Whisk powdered sugar, milk, vanilla, and pumpkin spice until smooth. Drizzle over cooled donuts or dip for additional sweetness.