In a large, heavy bottom pot; heat oil over medium while prepping batter.
Mix all doughnut batter ingredients until free of lumps.
Drop a small dollop of batter into the oil. Once the batter floats to the top and is bubbling/sizzling, discard and begin dropping batter using a 1 Tablespoon cookie scoop.
Flip doughnuts while frying. Fry for 3-4 minutes or until dark brown.
Using a metal skimmer or slotted spoon, transfer doughnuts to prepared cinnamon/sugar blend.
Roll to coat with sugar. Transfer to the baking sheet lined with paper towels.
Allow to cool for 2-3 minutes before serving.
To store, refrigerate doughnuts in an airtight container. Use within 3 days.