1 (12 oz.) can diet soda (any flavor)
1/3 c. instant non-fat dry milk
1 tsp. vanilla
1/2 tsp. extract (strawberry, almond, rum or brandy)
1/2 c. fresh fruit
1/8 tsp. artificial sweetener
1 c. coarsely crushed ice

Combine all ingredients in blender. Whirl at high speed until frothy and blended.