Heat oven to 350 F. In a large bowl, sift together dry ingredients.
In a separate bowl, combine milk and egg whites. Mix well. Add milk and egg mixture to dry ingredients. Mix until well-moistened.
Lightly grease the bottom of a 5-by-8-inch loaf pan. Place the dough in the pan. Using a sharp knife, make a slash in the dough lengthwise, about 1/4 inch deep.
Bake for 50 to 60 minutes. To test for doneness, insert a skewer or knife into the center of the loaf. It should come out clean. Cool thoroughly on a rack before slicing.