01 - Combine cinnamon, nutmeg, ginger, cloves, and allspice in a small bowl. Mix thoroughly and set aside for multiple uses throughout the recipe.
02 - Mix granulated sugar with 2 teaspoons of the prepared pumpkin spice blend in a wide bowl. Set aside for coating the fried donuts.
03 - Separate refrigerated biscuit dough into individual biscuits. Use a 1-inch round cutter or bottle cap to punch out the center of each biscuit, creating donut shapes. Reserve the cut-out centers to make donut holes.
04 - Pour vegetable oil into a large, heavy-bottomed pot. Heat to 350°F, maintaining consistent temperature for even frying.
05 - Carefully lower 3-4 donuts into the 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 a paper towel-lined tray to drain excess oil for 30 seconds.
07 - While donuts are still warm, toss them gently in the spiced sugar mixture until thoroughly coated on all sides.
08 - Whisk powdered sugar, milk, vanilla extract, and 1/2 teaspoon pumpkin spice mix until smooth. Drizzle over cooled donuts or dip tops for added sweetness.