L'Albero dei gelati in Park Slope is by far the best gelato in Brooklyn. It tastes exactly like the flavors found in Italy. I should know - I had a gelato nearly every afternoon with my daughter for the entire year we lived in Tuscany. Going to the L'Abero dei gelati with her brought back such memories. The attention to ingredients and producers explains the quality. It's also a gorgous little storefront with a sidewalk service window and friendly staff.