Q: Passage: I Ca n't Believe It's Not Butter! is a spread brand produced by Upfield.

Question: Based on this passage, who makes i can't believe it's not butter? Let's give stream of consciousness first:
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. Therefore, the final answer is Upfield.
assistant