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 1/2 full.
Bake for 18-20 minutes or until a skewer comes out clean.