The meals [that]Hulk makes taste so good，[that]有兩種版本，一是形容詞子句，一是同位格，好像形容詞子句較為合理？

Reference to your book for information:-TW Chen's the heart of grammar:-The meals----S
(that Hulk makes)---used instead of which about things----(ADJECTIVE CLAUSE< mentioned)
taste----v---plural S needs plural v, no need to add "s"
so good----(=very good)(adv),to such a degree.
ie:-
The "meals was so good" that Hulk "makes in the taste".----collocation style case, similar for comparion case with  S-O; ie:-S=good meal;
O=good taste.

Thank so much, Your answer are always good and excellent.