01 - Combine cinnamon, nutmeg, ginger, cloves, and allspice in a small bowl. Mix thoroughly until uniform.
02 - Mix granulated sugar with 2 teaspoons of the prepared pumpkin spice blend in a wide, shallow bowl.
03 - Separate biscuits from cans. Use a 1-inch round cutter or bottle cap to cut center holes from each biscuit, creating donut shapes. Reserve removed dough for donut holes.
04 - Pour vegetable oil into a large heavy-bottomed pot. Heat to 350°F, monitoring temperature with a kitchen thermometer.
05 - Carefully lower 3-4 donuts into hot oil. Fry 1-2 minutes per side until deep golden brown. Fry donut holes approximately 1 minute total.
06 - Remove fried donuts using a slotted spoon. Transfer to paper towel-lined tray to drain briefly, about 30 seconds.
07 - Immediately toss warm donuts in spiced sugar mixture, turning to coat all surfaces completely. Work quickly while donuts remain warm.
08 - Whisk powdered sugar, milk, vanilla extract, and remaining pumpkin spice until smooth. Drizzle over cooled donuts or dip tops for added sweetness.