Add banana, avocado, milk, 1 tablespoon honey/maple syrup, cacao, vanilla, 1/4 teaspoon peppermint extract, ice and gelatin to blender. If desired, add optional egg yolks, almond butter, and additional supplements/add-ins. Turn blender on, remove cap from the blender lid, and pour in additional liquid/ice if needed. When the smoothie reaches your preferred consistency, add coconut oil/butter through the hole in a slow, steady stream. Taste, add additional 1/4 teaspoon peppermint extract and/or sweetener if desired, and serve.