grammatical number - Pumpkin Noodles is a thing or are a thing?

Which of the following is correct?

How come pumpkin noodles is not a thing?

or

How come pumpkin noodles are not a thing?

I want to post one of the above statements to Twitter with a picture of a bowl of pumpkin noodles i.e. the stuff that comes out of a hollowed out pumpkin.