Blend. Place berries (1 cup) and avocado (1) in the blender, and pulse until they've broken down into small pieces. Add the milk (2-3 tablespoons, if using a high speed blender such as a Vitamix or Blendtect. If using other blenders, you may want to double the liquid), protein powder (1 scoop), Lakanto/Swerve (2 tablespoons) and blend until smooth. You may need to add more milk (depending on your blender).
Top + Serve. Scoop smoothie into a bowl and top with your favorites. Serve with a spoon and enjoy immediately.
Notes
Frozen berries - Feel free to sub in your favorite fruit-- raspberries and blackberries are your lowest carb options
Frozen avocado - Dice your avocado before freezing it. This can be done 30 minutes before.
Milk - Use whatever milk you like the taste of.
Protein powder - This is optional but highly recommended. If omitting, consider adding more sweetener. Taste test and make sure you like the flavor of the product you're using! My favorite brand is ISO Pure vanilla. Also, read labels carefully, as many products contain added sugar.
I switch between Lakanto or Swerve here, if using a different brand of erythritol (or allulose) you'll want to increase the amount added, as they're typically 70% as sweet.
Nutritional information is for 1 serving if you divide this recipe into 2. It uses raspberries as the fruit, and does not include any toppings: