Flavors rotate frequently and usually include a vegan offering. We sampled and loved the rich chocolate Stormy Night, made with rice milk. We then gobbled a daintily-portioned single of rich pistachio and balsamic-dappled Strawberry Je Ne Sais Quoi ($3.25) in about two minutes and still wanted more. Later in the day when we did the math, we realized that the pint size ($6) provides a pretty sweet value -- we should have grabbed that. Strictly for research purposes, of course.
If you find yourself in San Rafael, home of the original Three Twins (641 Del Ganado at Las Reposas), the folks behind the counter at the Lower Haight shop recommend you try the waffle cones made fresh on site. For now, anyway, customers in SF are out of luck: The limited energy supply in the small Lower Haight shop makes it a no-cone zone.