Preheat oven to 375°F. Spray silicone muffin tins with nonstick spray. Set aside.
Add all ingredients (except for optional toppings) to a high-powered blender or food processor, blending until uniform consistency forms and the batter turns green. Mix in any toppings, if desired.
Pour batter into muffin tins, filling muffin cups about three-quarters of the way full.
Bake at 375°F for 25-30 minutes, or until a toothpick inserted comes out clean.
Let cool and enjoy! Store in an airtight container in the refrigerator for up to 4 days. To reheat before eating (if desired), microwave for ~30 seconds.