1 1/2 cup sugar 1 cup butter 3 cups flour 1 1/2 cup yoghurt 5 eggs 3 tspns baking powder 2 tspns grated orange rind

Mix the butter with the sugar and beat for some minutes, using a mixer. Add the egg yolks and the yoghurt into the mixture and beat with a mixer until the mixture becomes smooth. In another bowl mix the flour, the baking powder and the grated orange rind. Beat the egg whites seperately and add gradually the egg whites and the flour into the yoghurt mixture. Mix well and then pour the mixture into a buttered baking pan. Bake in moderate oven for an hour.