This is a new Zealand version with mashed or sieved potato. We call them Boston Buns in the South Island and Sally Lunns in the North Island.
1 c mashed potato
3/4 c sugar
2 c flour
2 tsp baking powder
1 c sultanas
1/2 c milk
Mix potato and sugar together, add dry ingreds and sultanas, lastly mixing in the milk to a firm dough.
Knead, roll into two balls, place on tray.
Bake 200°C 30-35 mins
Ice when cold and sprinkle coconut lightly over the icing.
1 c icing sugar
50g butter, softened
1/2 tsp vanilla
4 tbsp milk
a few drops red food colouring (if wanting a pink icing)
Mix butter, vanilla, food colouring and icing sugar together, add milk till a thickish consistency.