How to Make Yummy Mixed Berry Smoothie How to make:Frozen berries mix.2/3 cup of Vanilla Yogurt.1/3 cup of milk.1 tablespoon of Maple Syrup.Ice cubes. How to Make the Best Mixed Berries Smoothie Place the mixed berries into the blender. Mix the Yogurt, Milk, Maple Syrup, and Ice Cubes. Pour into glasses and serve. Top up with fresh blueberries and strawberries.