A bit of alcohol would achieve that too right? Eg rum&raisin ice cream
Yes, though you have to be careful. If you add too much alcohol you'll prevent your mixture from properly freezing.
David Leibowitz, author of "The Perfect Scoop" recommends no more than 45ml of 80 proof liquor per 1 liter of ice cream mixture.
It feels like cheating but adding stabilizers (gums, mostly) was really a game changer for our homemade ice cream.
Tiny amounts needed.