01 -
Preheat oven to 375°F (190°C).
02 -
In a large bowl, mix together flour (or blended oats), baking powder, baking soda, cinnamon, and salt.
03 -
Add Greek yogurt, milk, bananas, eggs, spinach, and vanilla extract to a blender. Blend until completely smooth and spinach is fully incorporated.
04 -
Pour wet mixture into dry ingredients. Using a spatula, gently fold together just until flour is moistened. Avoid overmixing to maintain light texture.
05 -
Gently fold in grated sweet potatoes or carrots, walnuts, and sweetener if using.
06 -
Distribute batter evenly among 12 prepared muffin cups.
07 -
Bake in preheated oven for 20-25 minutes, until a toothpick inserted in center comes out clean.
08 -
Let muffins cool in pan for 5 minutes before transferring to wire rack to cool completely.