Get a bowl, and sift together the flour, salt, sugar, baking powder, and baking soda.
In a another bowl, whisk together the buttermilk, egg yolk and melted butter.
Now get another bowl, and whip the egg whites until they create a stiff peak foam.
Pour the buttermilk mixture into the dries, and mix until fully combined.
Fold in the egg whites.
Heat and grease a non-stick skillet or pan over low to medium/low heat.
Pour batter to create 2 ½ inch diameter cakes. Cook cakes for about 2 minutes or until bubbles form. Flip and cook for another minute or so, or until the side begins to brown.
Remove cakes from skillet and repeat with remaining batter.
