Adjust heat to medium-low, cover, and simmer, stirring occasionally, until fruit has softened, about 5 minutes. Mash gently with a spoon and simmer for another 2 minutes, uncovered, then set aside.
Sweet and tart berries give this mixed berry smoothie its deep purple color. You can use a mix of any varieties you have on hand. We recommend using a blend of fresh and frozen for the best texture in ...