カップラーメンができるの待ってるって英語でなんて言うの？

Well you can state that you are 'waiting on/for' the cup noodles. In context that would probably be sufficient detail to describe waiting for the noodles to soften in the boiling water. Alternatively the second example sentence describes exactly what you just did - and an easy deduction will make the listener aware that you are now waiting for the noodles to soften prior to eating them.

1.I'm just waiting for my instant ramen. This means that you are staying where you are until you get your instant ramen.

Use "I'm still waiting" if you have been asked the question a second time. "My cup of noodles isn't ready yet" implies that you are waiting. "until" is used to indicate that the action of waiting will continue to a specified time (when it is ready).

The two sentences you see provided above are great ways to express to your listener that you are waiting for your instant ramen to be ready. In the first sentence you will see the word finish and in the second sentence you will see the word done. Both of these words mean something is ready for use. These words would make awesome additions to your vocabulary since they can be used in both formal and informal settings.

You can use both of these sentences when saying that you are waiting for your instant ramen to cook. ''Instant ramen'' or ''instant noodles'' are noodles/ramen that cooks instantly. You do not have to wait long for these to cook. ''I am waiting'' means that you are staying there until a certain thing happens. Examples: I am waiting for the soup to boil. I am waiting for Daisuke, san to finish school. I am waiting here to speak to the boss.

Just waiting for my ramen to finish. Explanation: In many English-speaking countries, instant ramen/cup noodles are well enough known that people refer to it simply as "ramen." By saying "waiting... to finish" it will be clear to the other person that you are waiting for the noodles to finish cooking. Making ramen. You would say this in a very casual context. By "making" you are referring to the time it takes the ramen to finish cooking-- you don't have to actually be doing anything to the noodles. TO be more polite you could say, "I'm making ramen," but the "I'm" is assumed in a casual context, so not needed.