Freeze the Heath bar. Break the candy into tiny pieces with a knife handle before removing form wrapper. Combine all of the ingredients in the blender and blend for 30 seconds on med. Speed. Stop the blender to stir the mixture with a spoon; repeat until well mixed. Pour into a 16-oz. Glass. Your homemade blizzard may not be as thick as its commercial counterpart. If you would like a thicker treat, after pouring the mixture into your cup, simply place it in the freezer for 5 to 10 minutes, or until it reaches the desired consistency. Variations: Try substituting different candies.