The Butter Robot is a small, two armed, mobile robot Rick Sanchez created for the sole purpose of passing butter.
In "Something Ricked This Way Comes" upon its creation, it asks Rick, "What is my purpose?", in response, Rick tells it to pass the butter. Moments after completing its task, the Robot repeats, "What is my purpose?" Rick clarifies that it passes butter. It looks down realizing its sole reason for existence is for something so mundane and says "Oh my god." Rick responds "Yeah, welcome to the club, pal."
Later on, while Rick is dining alone, the Robot passive-aggressively slams a whole stick of butter in Rick's food tray, then spurns his offer to see a movie by answering: "I am not programmed for friendship."
The Butter Robot makes a last appearance in the same episode as Morty's science fair project held up inside a sandwich bag. Its last word on screen is "Butter."
- “Why reach for the butter yourself?”
- —In-game description