Peel the potatoes and cook until tender in boiling, salted water. Put through a ricer or mash. Cool.
Beat the eggs and add to them the orange juice and rind. Melt the butter, and blend with the cream and sugar; then add salt and baking powder. Fold everything together with the cooled potatoes and mix thoroughly. Put in a buttered oven dish. Bake for 1 hour in a 350 degree oven.