Preheat oven to 350°F.
Add all ingredients to a blender in the order listed, EXCEPT for the mix-ins.
Blend until the mixture appears smooth and consistent.
Fold in the mix-ins with a spatula. I like fewer dishes so I do this right in the blender!
Spray or line 12 muffin tins, then add fill each tin about 3/4 full of the mixture.
Bake for 20-25 minutes.
The muffins are done when a toothpick comes out clean and/or the tops bounce back when gently pressed.
Store in the fridge in an airtight container for a longer shelf life.