Spray muffin tins with non-stick coconut oil cooking spray (or line with paper muffin cups). Set aside. (I've found these turn out the nicest when I spray silicone baking cups with coconut oil spray. The muffins tend to stick to the paper muffin cups. But they easily slide out of the silicone baking cups.
Add oats to blender and blend until you've made oat flour.
Combine all ingredients together in a large bowl in the order listed. Stir together until you have a smooth batter with no lumps. (The batter will be very thin and watery.)
Scoop/pour batter into prepared muffin tins. Fill each muffin well about 3/4 full.
Place muffin tins into oven and bake for 18-20 minutes, or until a toothpick comes out clean.
Allow muffins to cool before removing from pan.
Makes about 21 regular-sized muffins (depending on how full you fill each muffin well).