At Murray's Cheese in the West Village, they call it the "Meltshake". Enter in through the glass doors on Bleecker, and look to your right. There you'll see a big chalkboard offering shakes concocted in flavors of Chocolate and Vanilla, both made with Van Leeuwen ice cream. This milkshake counter goes hand in hand with the pressed sandwich counter, with pre-assembled and made-to-order sandwich options, all grilled warm.
I had the chocolate milkshake, chilly and thick enough to remind you that this is a milkshake and not just a cold chocolate drink. You can easily find thicker shakes in the city (hello, BRGR), but sometimes you don't want to expand that much effort sucking the summertime sweet up a straw. I'm not a fan of Van Leeuwen served on its own, but the ice cream fared well in the chocolately-rich shake, where it wasn't the lone player. On a lazy weekend afternoon, there must nothing more lovely that ordering a sandwich and milkshake to go, and picnicking in the nearby, newly renovated Washington Square Park.