Gather your ingredients: plain Greek yogurt, frozen blueberries, frozen banana, frozen strawberries, and milk.
Add the Greek yogurt to your blender, followed by the frozen blueberries, frozen banana, and frozen strawberries.
Add a splash of milk to your blender to help blend everything smoothly.
Secure the lid and blend on high until creamy and well combined. Scrape down the sides if necessary.
If too thick, add more milk until you reach your desired consistency.
Pour into a glass or cup and enjoy immediately. Top with fresh berries or banana slices if desired!