Pampepato or panpepato di Terni, also known as diamante delle terre di San Valentino is a traditional cake originating from the province of Terni and the neighboring municipalities in the province of Perugia. The cake is made with a combination of chocolate, raisins, nuts, cocoa powder, candied fruit, coffee, spices, honey, and flour.

It's usually prepared during the festive Christmas season. Pampepato di Terni is dome-shaped and dark brown in color, with nuts visible on the surface. The texture is soft, compact, and crunchy, while the aromas are that of chocolate, nuts, and spices such as pepper, nutmeg, and cinnamon.

The cake is sold in single-product packages, either whole or cut into slices. It dates back to 1913, when it was known as the Terni cake.