Prepare the donut holes: Open the can of biscuit dough and separate the biscuits. Use a small round cutter or your fingers to punch a hole in the center of each biscuit, creating a donut hole shape. You can also simply pinch off small pieces of dough to create smaller donut holes.

1. Heat the oil: In a large pot or deep skillet, heat about 2-3 inches of vegetable oil over medium-high heat. Use a thermometer to check the temperature, aiming for 350°F (175°C). If you don’t have a thermometer, drop a small piece of dough into the oil—if it sizzles and rises to the surface quickly, the oil is ready.
2. Fry the donut holes: Carefully lower the donut holes into the hot oil, a few at a time, to avoid overcrowding. Fry for about 2-3 minutes, turning them occasionally until they are golden brown and crispy. Use a slotted spoon to remove them from the oil and place them on a paper towel-lined plate to drain excess oil.
3. Coat with cinnamon sugar: While the donut holes are still warm, mix the granulated sugar and cinnamon in a shallow bowl. Roll each donut hole in the cinnamon sugar mixture until fully coated.
4. Serve and enjoy: Serve your Biscuit Dough Donut Holes warm, either on their own or with a side of chocolate glaze or powdered sugar for extra sweetness.