Preheat the oven to 350 degrees.
Prepare 15 muffin tins with liners or non-stick cooking spray.
Whisk together (or sift) the cocoa powder, flour, baking powder, baking soda, and salt in a bowl to remove any clumps and set aside.
½ cup cocoa powder, 1 cup whole wheat flour, 1 teaspoon baking powder, 1 teaspoon baking soda, ¼ teaspoon salt
Puree the banana and kale in a food processor or blender. (I wish I had a photo of this — it was awesomely green!) I was never able to get the mixture 100% smooth. Small specks of kale are fine.
3 medium ripe bananas, 200 g kale
Whisk the eggs, oil, sugar, and vanilla together until smooth.
4 eggs, ¼ cup coconut oil, ½ cup sugar, 1 teaspoon vanilla
Add the banana-kale puree to the egg mixture and whisk together until well incorporated.
Pour the dry ingredients into the wet and mix until just combined.
Evenly distribute the batter across 15 muffins using an ice cream scoop. One scoop per muffin was perfect!
Bake for about 20 minutes or until a toothpick comes out clean when stuck in the middle of a muffin.
Remove from tin and let cool.
Enjoy!