Passage: I Ca n't Believe It's Not Butter! is a spread brand produced by Upfield.\n\nQuestion: Based on this passage, who makes i can't believe it's not butter?
Steam of consciousness below:

User
The important part for answering this question is: I Ca n't Believe It's Not Butter! is a spread brand produced by Upfield.
So, the answer is Upfield.
Assistant