Mix sugar and yogurt. Peel and slice kiwi into thin slices. Place equal number of kiwi slices at the bottom of each wine glass. Add a couple tablespoons of yogurt (to cover kiwi). Then add a layer of blackberries. Add a few more spoonfuls of yogurt. Add a layer of raspberries. Add another spoonful of yogurt.
Put cookies in a food processor and blend until powdery. Top each dessert with a layer of powdered cookie. Add a mint sprig to each glass.