We used to have a Hagen Daz store in the neighborhood... and I really liked their cake made with vanilla fudge icecream and lots of choc. frosting. However, the store was ripped down to make way for another condo... and I'm told Hagen Daz is discontinuing vanilla fudge!!
Chinatown Ice Cream Factory at 65 Bayard. Their ice cream is premium and 1% richer in butterfat than Hagen-Daz. More exotic flavors as well. Some ice cream cakes they have on hand, others require a 24 hour lead time.