Avocado-Banana-Walnut Muffins

Preheat the oven to 350 degrees F (175 degrees C). Line a 12-cup muffin tin with paper liners.

Cream together bananas and avocado in a mixing bowl using an electric mixer. Pour in eggs and milk; mix well.

Whisk whole wheat flour, brown sugar, white sugar, baking soda, cinnamon, and salt together in a separate bowl.

Pour flour mixture into banana mixture slowly and mix until incorporated. Add walnuts and mix for 1 minute.

Divide batter into the prepared muffin cups.

Bake in the preheated oven until a toothpick inserted into the center of a muffin comes out clean, about 20 minutes.