1 qt. blueberries
2 1/2 c. sugar
1 qt. milk
1 can evaporated milk
1 can condensed milk
1 tsp. vanilla
2 c. plain yogurt

Boil berries in enough water to not quite cover, mash and strain off juice. While juice is warm, add sugar and let dissolve. Add rest of ingredients and pour into freezer or churn. This can be stored in individual containers with tops and it will stay creamy; not hard as ice.