Final answer:
The sentence requires a comma after the word 'rolls' to have correct punctuation.
Step-by-step explanation:
The sentence provided is missing a comma after the word 'rolls'. The correct punctuation would be as follows: 'Unless I serve cinnamon rolls at my party, Gomez Addams will not attend.' The comma is necessary to separate the introductory dependent clause 'Unless I serve cinnamon rolls at my party' from the independent clause 'Gomez Addams will not attend'.
Learn more about Punctuation in English sentences