Add Ingredients to Blender:
Place the avocado, banana, milk, yogurt (if using), honey or maple syrup, vanilla extract, and ice cubes in a blender.
Blend Until Smooth:
Blend on high speed until the mixture is creamy and smooth. If the smoothie is too thick, add more milk a little at a time until it reaches your desired consistency.
Taste and Adjust:
Taste the smoothie and adjust the sweetness by adding more honey or maple syrup if needed.
Serve:
Pour the avocado smoothie into a glass and serve immediately. Enjoy it fresh for the best flavor and texture!