To save everyone the google:
Penuche (
Italian:
panucci) is a
fudge-like candy made from
brown sugar,
butter, and
milk,
[1] using no flavorings except for
vanilla. Penuche often has a tannish color, and is lighter than regular fudge.
[2] It is formed by the
caramelization of brown sugar; thus, its flavor is said to be reminiscent of
caramel.
Nuts, especially
pecans, are often added to penuche for texture, especially in the making of penuche candies.
[1] It is primarily a regional food, found in
New England and some places in the
Southern United States, though in the latter it goes by different names, usually "brown sugar fudge candy".