From : www.slice.seriouseats.com

The Best Pizza in Penn Station (And Down the Street)
Posted by Aaron Mattis

If you have some time before your train departs, it's worthwhile to leave Penn Station and head one block south to NY Pizza Suprema, an old-school slice joint and neighborhood favorite. Though we liked the classic New York slice, the pizzeria's real standout was the upside-down slice, a thick, square slice with the cheese under the sauce. That sauce, which tasted sweet and fresh, was the highlight of every slice we tasted, and the upside-down slice placed it front and center. Modestly portioned cheese and a light, burnished crust helped make this by far the best slice we tasted.

NY Pizza Suprema: 413 8th Avenue between 30th and 31st St., New York, NY 10001