Preheat oven to 400°. Line a 12-cup muffin tin with muffin-cup liners, round pieces of parchment paper, or spray the tin with cooking spray.
In a blender, process the oats until they have the consistency of flour, about 1 minute.
Combine the remaining ingredients with the oat flour in the blender; blend until smooth and creamy, about 1-2 minutes.
Divide batter evenly among prepared muffin cups. Sprinkle with toppings of your choice.
Bake at 400° for 15 minutes or until a toothpick inserted in center comes out clean. Cool muffins in pan 5 minutes. Remove from pan; cool completely on a wire rack.
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