Preheat the oven to 350°F.
Place all ingredients in a blender. Blend everything on high for a minute or two until a smooth batter forms.
Place 12 muffin cups into a muffin tin and pour the batter divided evenly between the cups. Sprinkle the tops with extra oats and gently press them down.
Bake for about 25 to 28 minutes until a toothpick comes out with a few clinging crumbs. Remove from the muffin tin and allow them to cool to room temperature before serving (see Notes). Store refrigerated for up to 10 days or frozen for up to 3 months.
