Newtons are a Nabisco-trademarked version of a cookie filled with sweet fruit paste. "Fig Newtons" are the most popular variety (fig rolls filled with fig paste). An extrusion process produces them. Their distinctive shape is a characteristic that has been adopted by competitors, including generic fig bars sold in many markets. The product was invented by Charles Roser and baked at the F. A. Kennedy Steam Bakery for the first time in 1891.

Source: Wikipedia