Preheat your oven to 350°F (175°C). Grease or line a muffin tin with liners.

In a mixing bowl, mash the ripe avocado and bananas together until smooth.

Add the eggs, milk, and vanilla extract to the avocado banana mixture. Mix until well combined.

Add in your remaining ingredients and mix until just combined - do not overmix.

Spoon the batter into the prepared muffin tin, filling each cup about 3/4 full.

Bake in the preheated oven for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.

Allow the muffins to cool in the tin for a few minutes, then transfer them to a wire rack to cool completely.