Preheat oven to 350F. Grease a muffin tin well.
In a food processor or blender, combine all of the ingredients, blending until just combined and no chunks remain. Fold in any add-ins (berries, etc). If using frozen berries, chop them into small pieces (even the smaller berries) or it can produce too much moisture and affect baking.
Divide the batter amongst the muffin tin. This should yield about 8 muffins.
Bake for 20-25 minutes, until the tops are firm to touch and a toothpick inserted comes out clean. I check mine around 20 minutes, as you don't want to over-bake or they'll dry out. If you add frozen berries, they may need to bake a few minutes longer. And don't worry if you end up opening berry muffins to see they seem a little moist on the inside - they're delicious!
Enjoy! Store in an air-tight container in the fridge for up to 5 days. Reheat prior to eating if you like!
