As you know, the Grandmapocalypse causes the nice grandmas that bake cookies to turn evil. However, this also causes cookie demons to come straight from Hell and wrinkle your cookies and scar the planet. It also causes some cookies to get infested by insects covered in blood, which are probably closely related to the wrinkly cookie demons. After the Grandmapocalypse is done with one planet, it slowly spreads across the universe, wrinkling everything in its path.