- Combine berries and sugar in a blender; process until smooth and sugar has dissolved (about 1 minute). 
- Add the buttermilk and dash of vanilla, process until well blended. Add the lemon juice and pulse to mix. 
- Chill in fridge for about 1 hour. Pour into freezer can of an ice-cream maker, process according to manufacturer's instructions. 
- Serve immediately or place covered in freezer until desired consistency is reached (I like mine after about 3 hours). Enjoy!