Add all ingredients to a blender and blend until smooth.
If not using frozen avocado, chill smoothie for at least 30 minutes before drinking.
If you want to boost the fat and calorie intake of this smoothie, you can add MCT oil.
You can also top with keto-friendly whipped cream to make this recipe even more pie-like. Keto-friendly whipped cream is not included in the macros, so make sure to factor that in if you add it to your smoothie.