Preheat oven to 180°C and grease your donut pan with flavourless oil.
In a medium bowl combine flour, sugar and baking powder.
Stir in milk, butter and egg until combined.
Transfer mixture to a sandwich bag and cut a corner to make a small hole.
Using your DIY piping bag, pipe a circle of mixture into each donut hole so that it's approx ½ full.
Bake for around 10 minutes or until the edges are lightly browned.
Allow to cool on a wire rack.