Add the frozen mixed berries to your blender first. This helps them break down more easily and creates a smoother final texture. The frozen berries will also help keep your smoothie thick and creamy.
Pour in the Greek yogurt, followed by the milk. Start with less milk and add more if needed – you can always thin it out, but it’s harder to thicken it back up. The yogurt should be cold from the refrigerator for the best results.
Drizzle in the honey and add the vanilla extract. If you’re using flaxseed, add it now. Start your blender on low speed and gradually increase to high. Blend for 60-90 seconds until completely smooth and creamy.
Stop and check the consistency. Your Mixed Berry Yogurt Smoothie should be thick enough to coat the back of a spoon but pourable. If it’s too thick, add milk one tablespoon at a time. If it’s too thin, add more frozen berries or a spoonful of yogurt.
Taste and adjust sweetness if needed. Pour into a tall glass and enjoy immediately for the best texture and flavor. The beautiful purple-pink color makes this smoothie as Instagram-worthy as it is delicious.