Preheat oven to 350 degrees F. Line your muffin tray with 12 muffin cups.
In a blender, first add your oats and blend until you get a nice flour-like mixture.
Then add all other ingredients (EXCEPT for the chocolate chips and raisins) and blend on high for 3-4 minutes, or until everything is combined and smooth. In the end add the add-ins of choice and stir with a spoon)
Pour this mixture in your 12 cups evenly. Bake for 10-13 minutes or until a skewer inserted in the middle comes out clean.
Leave them to cool for 5-10 minutes and they are ready to serve! Enjoy!