Its funny. I was about to post an update! I didn't yet try the charcoal idea from @Berties but I tried just about everything else. If you are into grey pasta, I'm now an expert....how is the quest coming?
However, I was going to post because someone has beaten me to it. Quite by chance I found and ordered this from Ocado. Its made from black beans which is one of my ideas and which I tried out. However, this is made entirely from black beans (no flour), hence the black, rather than grey colour. Arguably its not really pasta! Its a Swedish product and is called
A La Eco Black Bean Spaghetti. Anyway, I bought some as it was on offer for £1,99. I'll report back on whether it tastes anything like pasta.
, and then I saw it had squid ink in it and though yuck! (I'm vegan) so would love to try and make some vegan friendls black pasta for this Halloween. Has anyone tried just adding black food colouring or does that not work? Here is some vegan friendly colouring from Lakeland 