In a small bowl, combine 1 cup of diced peaches and 1 teaspoon of vanilla extract. Let this sit while you prepare your other ingredients. Save any peach juices that remain in the bowl.
Combine the reserved peach juice with fairlife ultra-filtered milk and 1 teaspoon vanilla extract. (I use fairlife ultra-filtered milk because it makes my ice cream creamier)
Turn on ice cream maker and pour milk mixture into the freezer bowl. Let it mix 5 minutes and then add in bowl of diced peach mixture.
Let the machine mix for 20-25 minutes or until desired thickness of ice cream. 5 minutes before mixing is complete, add in the sliced peaches and let it mix completely.
Add pistachios on top to liking.
This recipe was made with the Cuisinart Ice Cream Maker so be sure to chill the freezer bowl at least 8 hours or overnight. You can use frozen or fresh peaches. Thaw completely if using frozen peaches.