Ingredients for 2 servings

• 1 cup all-purpose flour
• 2 teaspoons sugar
• ½ teaspoon salt
• ½ teaspoon baking powder
• ¼ teaspoon baking soda
• ¾ cup buttermilk
• ¼ cup milk (plus a teaspoon or so if the batter is too thick)
• 1 large egg, separated
• 2 tablespoons unsalted butter, melted

Whisk dry ingredients in medium bowl.
Pour buttermilk and milk into 2-cup Pyrex measuring cup.
Whisk egg white into milk mixture.
Mix yolk with melted butter, then stir into milk mixture.
Dump wet ingredients into dry ingredients all at once; whisk until just mixed.