Add the frozen strawberries, frozen blueberries, frozen raspberries, avocado, oats, honey, vanilla extract, and ice.
Blend until the smoothie is smooth and creamy.
Divide the smoothie between 2 glasses or jars.
Sprinkle each serving with 1 teaspoon granola, if using.
Serve right away.
Notes
Tips and Tricks
Use a ripe avocado - A ripe avocado blends smoother and gives the smoothie a better texture.Taste before adding honey - Frozen berries can vary in sweetness, so taste the smoothie before adding extra honey.Use frozen berries straight from the freezer - This helps keep the smoothie cold and thick.Add more milk if needed - If the smoothie is too thick for your blender, add a small splash of milk and blend again.