01 - Combine cinnamon, nutmeg, ginger, cloves, and allspice in a small bowl. Mix thoroughly and set aside for multiple uses.
02 - Mix granulated sugar with 2 teaspoons of the prepared pumpkin spice blend in a wide, shallow bowl. Set aside for coating.
03 - Separate refrigerated biscuit dough into individual pieces. Press a 1-inch round cutter or bottle cap through the center of each biscuit to create donut shape. Reserve removed centers for donut holes.
04 - Pour vegetable oil into a large, heavy-bottomed pot. Heat to 350°F, maintaining consistent temperature throughout frying process.
05 - Carefully lower 3-4 donuts into hot oil. Fry for 1-2 minutes per side until golden brown. Fry donut holes separately for 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 - While donuts are still warm, toss in spiced sugar mixture until evenly coated on all sides. Work quickly for best adherence.
08 - Whisk powdered sugar, milk, vanilla extract, and remaining pumpkin spice until smooth and ribbon-like consistency forms. Drizzle over cooled donuts or dip tops for extra sweetness.