In a large bowl, add yeast in warm milk. Mix it with wooden spoon. Add butter (butter should be on room temperature) sugar, milk powder and egg. Mix it.

Add flour, and mixed it till combine (if dry add little more warm milk, or if looks like more sticky then add some flour) combie it and leave it for an hour for rising.

When it's became double in size then knead it again. Roll it and cut in doughnuts size round cut. Leave it for double proofing. Then make hole in the middle and fry in medium low flame till light golden brown. For icing sift icing sugar and cocoa powder and mix cold milk and vanilla extract in till mix till required consistency. Dip light warm doughnuts in the icing and set for a while. Add som sprinkles and place in fridge before serving.