I bough 2 mini tube donut´s pans 2 years a go and haven´t used it until I saw Ching´s-Little Corner of Mine Healty baked donut here. The original recipe comes from Peony´s my Culinary Journal. I made slighly modification with her recipe. Thank you for sharing.
ingredients: Makes 12 mini donuts

1 cup flour ( 100 g all purpose flour)
1/3 cup sugar (75 g sugar)
3/4 teaspoon baking powder
3/4 teaspoon baking soda (Natron)
1/4 teaspoon salt
1 egg
1 tablepoon canola oil (rapsöl-vegetable oil)
2 teaspoons lemon juice
1 tub (150 g) plain yoghurt (200 g sour cream/schmand)
directions: combine all ingredients in a food processor until mix well. Bake in preheat oven at 180°C for about 10 minutes.
P.S: See also campaign in The Breast Cancer Site from my blogging friend Little Corner of Mine.