Puree blackberries and press through fine mesh sieve.

Return blackberries to blender and add brown sugar, milk, and frozen yogurt. Pulse until mixture comes together.

Variations; Coconut milk, yogurt, raspberries, blueberries, grapes, bananas, strawberries, plums, pomegranate, cranberries, dates, figs, kiwi, pineapple, mango, guava, papaya, apple cider, apple sauce, almond, caramel, cinnamon, lemon, lime, ginger, maple, peaches, pecans, oranges, mint, almond milk, melon, pumpkin, rhubarb, vanillla