Nutella Churro Donut Holes

1: Preheat oven to 176C | 350F.

2: Spray a 24-count mini muffin tray with cooking oil spray; wipe over excess with paper towel and set aside.

3: In a large bowl, whisk all of the dry ingredients together.

4: Make a well in the centre and add the oil, egg, vanilla, and milk.

5: Whisk the batter until smooth and lump-free.

6: Spoon the batter (about 2 teaspoons) into each muffin hole, filling to ¾ full.

7: Bake for 10-15 minutes, or until they are golden in colour and a toothpick inserted into the centre comes out clean.

8: Allow them to cool for 5 minutes and transfer them onto a cooling rack.

9: Brush each donut with a light coating of melted butter; combine the sugar and cinnamon together in a shallow bowl; toss each donut hole into the cinnamon sugar mix until evenly coated.

10: Fill a piping bag with the Nutella and using a narrow nozzle, fill each donut with the Nutella until they puff up and expand.