Blend in a high-speed blender until smooth and creamy. If the mixture is too thick, add more milk or dairy-free milk (or coconut water) to reach your desired consistency.
Taste the smoothie and adjust sweetness if necessary by adding more honey or maple syrup.
If you prefer a colder smoothie, add some ice cubes to the blender and blend until smooth.
Pour the smoothie into glasses and serve immediately.
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Notes
Use ripe banana and avocado for the creamiest texture and best flavor
Frozen banana or avocado slices make your smoothie extra thick and chilled without ice
Frozen spinach works great for a frostier smoothie and saves prep time
Add a splash of lemon or lime juice for a fresh twist
Boost nutrition with ginger, chia seeds, flaxseeds, or protein powder
Add peanut or almond butter for extra protein and creaminess
Sweeten lightly with honey or maple syrup, if desired
Best enjoyed fresh, but leftovers can be stored in an airtight container in the fridge for up to 24 hours – shake or stir before drinking