Mix together ingredients in order of their listing, mix enough so the batter is fully encorperated and holds together nicely.
Prepare muffin tins and add batter to fill the tins 3/4 of the way full.
Bake at 375 for 30-35 minutes. Beacuase of the sourdough nature, these muffins bake more slowly, so make sure they are completely baked with a toothpick before removing.