If you are not using canned sweet potatoes, you will need to cook the sweet potatoes first. Any method you choose is fine: bake, boil, slow cook, or microwave. They will need to be cool and mashed before making them muffins.
Preheat oven to 350 degrees F.
Line muffin pan with paper liners or silicone liners or lightly oil.
In a large mixing bowl add the first 7 ingredients and mix well.
In a smaller bowl add the applesauce, mashed sweet potatoes, apple cider vinegar, and dairy-free milk. Whisk together well.
Add the sweet potato mixture to the dry ingredients. Mix to combine all ingredients.
Fold in dried blueberries, raisins, and/or chopped walnuts.
Fill muffin cups about 3/4 full. I end up with 16 muffins.
Bake for 25 minutes
Remove the muffins from the oven and let them cool on a wire rack. I prefer to remove my muffins from the silicone liners within 10 minutes to prevent moisture from forming on the inside.