Vampire's Blood Shake

2 cups plain yogurt
1/2 tsp. vanilla extract
1 package frozen strawberries or raspberries, thawed
Ice cubes 
1 pint strawberry ice cream

1.Mix yogurt, vanilla, and berries in the blender.
2.Pour into tall glasses over ice cubes, or chill.
3.Top with a big spoonful of strawberry ice cream.