"Spicy ramen is the most delicious."
Why is this not an acceptable answer?
Because you're changing the role of the words and thus the intended meaning.
The ramen part is modified by "most delicious". The verb is "to be spicy". You're doing it the other way around.
I guess if you'd like to say exactly this way it would have to be
"매운 라면은 가장 맛있어요"
If you look at the tips and notes for this skill, it says 가장 can only be singular. In other words, there can't be two most delicious ramens. There can only be one.
i wish the default translation used the korean romanization of ramen: ramyun.