Potato Flour Muffins
2 tablespoons sugar
¾ cup potato flour, or potato starch
1 teaspoon baking powder
½ teaspoon salt
4 tablespoons ice water
Separate the eggs and beat the whites until stiff and dry. Beat the yolks until thick and lemon colored, then fold them into the whites. Sift the flour, sugar, baking powder and salt together and fold into the egg mixture. Lastly add the ice water and fold until well mixed. Bake in greased muffin tins at 375 degrees for 20 minutes. Makes 12 muffins.
-- from Magic Chef Cooking, ca. 1929.
Potato starch and potato flour can be found more easily than ever these days, not just at Whole Foods, but even at Target! My local Target store now has a grocery section including a small baking supply aisle, with several gluten-free products.