Although some pretty great mockups have been created for food packaging designs, and a lot of them are free to download, it feels much nicer to use a mockup specifically designed for your purpose. For example, this one is originally crafted to present your peanut butter jar designs on a realistic scale.
In addition to quality and details, this jar mockup includes a few peanuts as well to jazz things up and make your previews much more unique. The lid color and the label design are easily changeable via smart objects. The great news, though, is that this peanut butter packaging mockup includes 2 files. So choose the suitable one and have fun!