In a high speed blender, add the blueberries, milk, and almond butter, and blend until thick and creamy.
Pour into two glasses and serve immediately.
Notes
For a richer smoothie, replace the milk with heavy cream or keto condensed milk. For a sweeter smoothie, add one tablespoon of your favorite keto sweetener. Freezer/meal-prep smoothie: Place the smoothie into an ice cube tray or shallow container. When ready to enjoy, pour into the blender and re-blend until smooth and creamy.