1 c. cold milk
1/2 c. fresh or frozen blackberries or raspberries
1-3 tbsp. sugar
Place in blender, cover, start on puree speed then push blend speed until smooth. It can be easier if the ice is broken up first.
Add a banana or fresh peaches
Use yogurt or ice cream instead of -- or in addition to -- the milk.
Leave out the ice cubes for a thicker and not so cold drink.