Corncornos

Corncornos are a brand of corn chips.

History
Dipper and Mabel Pines are first seen eating them in the opening scene as they are driving through town with Grunkle Stan. Mabel then puts two on her ears as nacho earrings, claiming she's hilarious, and Stan replies that whether on this is  debatable. When Mabel goes on stage during the Pioneer Day opening ceremonies, Pacifica Northwest makes fun of Mabel for wearing the chips as earrings, as well as Mabel's overall silliness, thereby causing her enemy to be embarrassed and leave the site with her brother. As the two talk at the statue of Nathaniel Northwest, Mabel talks about how Pacifica is always putting her down and removes her nacho earrings in shame.

Soos can be seen eating them in "The Deep End" as the Pines family arrive at the Gravity Falls pool. They are also shown drifting in the pool after Mabel drives away in the Mystery Cart with Mermando in a cooler. One unfortunate kid trapped in "solitary confinement" is seen eating them as they drift close to him.