This makes muffin baking as easy as possible with a prepared dry mix you add on to when it is time to bake.
Mix all of the dry ingredients in a resealable plastic bag, and set aside until ready to prepare the muffins.
Heat oven to 400 degrees. Butter a muffin tin, and set aside.
Place the dry-ingredient mixture in a medium bowl. Add the eggs, buttermilk, and melted butter. Mix to combine; the mixture should be lumpy.
Spoon the mixture evenly into the muffin tin, and bake until golden, 12 to 15 minutes. Remove from oven, and serve.