I have used this formula with every kind of fruit you can name, including canned pineapple. It was given to me by my friend Donna Florio of Birmingham, Alabama, and it seems to always work.
Stir buttermilk and sugar together to dissolve sugar a bit, then fold in remaining ingredients.
Churn in ice cream maker according to the manufacturer’s instructions. If you have time, let it set up in freezer for 2–3 hours before serving.