In sauce pan, steam rice on low in 1/4 cup milk and butter till soft. (Be careful not to burn.) Remove from burner and stir in 1/2 cup milk more. Separate egg white into a mixing bowl. Mix egg yolk into rice stirring quickly so it doesn't cook. Add 1 tsp sugar to egg white and beat with electric mixer until stiff. Mix dry ingredients in another bowl. Add dry ingredients to the rice and stir in. Fold in egg whites. Cook pancakes on hot griddle. Serve as side dish or for breakfast with butter and maple syrup.