Line a 12 ct muffin pan with muffin cups and set aside. Preheat the oven to 400 degrees F.
In your mixer, beat the milk, sour cream, eggs, sweet potato, and sugar until well blended.
In a separate bowl, combine the dry ingredients, and make a well in the center. Gently pour the wet ingredients into the well, and stir gently to combine - avoid over-mixing, the dough will be lumpy and thick.
Gently fold in the green chiles, just until combined. Divide evenly into 12 muffin cups (you may have enough left for 4 additional - you can make those after the first dozen are done).
Bake at 400 degrees F for 12-15 minutes or until a toothpick inserted in the center comes out clean - they should look firm, but not overly browned.
Remove from muffin pan and allow to cool thoroughly - enjoy with a pat of butter, honey or with a nice bowl of chili.