Then mix like this

1. Place butter into bowl. Melt 3 minutes / 70C / Speed 2.
2. Add remaining ingredients. Speed 4 / 30 seconds or until well combined.
3. Place mixture into a large piping bag. Pipe mixture into the machine or tin. I find this much easier than spooning in.
4. The machine takes 5-8 minutes to cook. if cooking in an oven it will be approximately 15 -18 minutes at 180 degrees. This depends on the size of the tin of course.
5. Carefully remove donuts from the machine/tin once cooked.
6. Combine the sugar and cinnamon in a small bowl.
7. Brush the sides of donuts with a little melted butter and coat in the cinnamon sugar.
8. Serve and cool on a wire rack to enjoy later.

Or cook like this

1. Place butter into bowl. Melt in the microwave on 50% heat for 1 minute.
2. Place banana into a large mixing bowl and mash with a fork until smooth.
3. Add remaining ingredients into bowl. Mix until combined.
4. Place mixture into a large piping bag. Pipe mixture into the machine or tin. I find this much easier than spooning in.
5. The machine takes 5-8 minutes to cook. if cooking in an oven it will be approximately 15 -18 minutes at 180 degrees. This depends on the size of the tin of course.
6. Carefully remove donuts from the machine/tin once cooked.
7. Combine the sugar and cinnamon in a small bowl.
8. Brush the sides of the donuts with a little melted butter and coat in the cinnamon sugar.
9. Serve and cool on a wire rack to enjoy later.