Combine all the ingredients for the homemade pancake mix in a large container and shake well to combine.
For the Pancakes:
Whisk together the egg whites and buttermilk in a bowl. In a separate bowl, whisk together the egg yolks and the melted butter.
Combine the buttermilk mixture with the egg yolk mixture in a large bowl and whisk until well combined. Add the pancake mix and whisk gently until just combined. Don't over mix, lumps are ok.
To make the pancakes, heat a griddle or pan over medium heat, add a small amount of butter. Once hot, pour some pancake batter on top. Cook on one side until set and golden brown, then flip and repeat with the other side.
Notes
Recipe from Alton Brown.
To make buttermilk, for each 1 cup of buttermilk, add 1 tablespoon of white vinegar or lemon juice to a measuring cup, then fill the rest up with normal milk. Mix and let stand 5 minutes until milk looks curdled then use instead of buttermilk in the recipe.