Preheat oven to 350 degrees F, and grease a muffin tin.
In the order listed, add all of the ingredients to a high-powered blender (could use food processor) and blend until smooth, scraping down the blender sides as needed. If you’d like to add raisins, nuts, or other mix-ins, stir them in after the batter has been blended smooth.1>
Pour the batter into the muffin cups. (You should have enough for 10-12 standard size muffins—the pictured muffins are from a batch of 10.) Top with chocolate chips or a sprinkle of oats if desired.
Bake for 15-20 minutes or until just cooked through the center. (Check on the early side so as not to over-bake.) Cool for 5-10 minutes before removing to a rack. Cool completely and store muffins, well wrapped, in the fridge for 3-4 days for maximum freshness.