Remove the biscuits from the can, separate them, and place them on a work space like a cutting board or rolling mat. Use a 1-inch round cookie cutter (or similarly-sized bottle cap) to cut holes out of the center of each biscuit.
Cook for 5-6 minutes or until donuts are lightly browned and you can see the layers of biscuit start to seperate. Flip halfway through the cooking process. Repeat with the remaining biscuits. In a small, shallow bowl or pie plate, mix together sugar and ground cinnamon.
Donuts can be stored at room temperature in an airtight container for several days, if they last long. They are best on day #1 and might need a quick 10-15 seconds in the microwave to reheat the butter goodness back to its former glory.