Preparation: Gather all ingredients. In a blender, combine 1 cup of fresh or frozen mixed berries, 1 banana, 1 cup of Greek yogurt, 1/2 cup of milk (dairy or non-dairy), and 1 tablespoon of honey or maple syrup.
Blending: Blend the ingredients on high speed until smooth and creamy. You may need to stop and scrape down the sides of the blender to ensure everything is well mixed.
Tasting and Adjusting: Taste the smoothie and adjust sweetness if needed by adding more honey or syrup. If the smoothie is too thick, add a bit more milk to reach your desired consistency.
Serving: Pour the smoothie into glasses. Garnish with additional berries or a sprinkle of granola if desired. Serve immediately and enjoy!