Ok, this one is purely for humorous purposes, but the Arrowverse consists of two widely popular characters who are awful at cooking.
And the two people I'm talking about are Felicity Smoak-Queen and Iris West-Allen

Author's Opinion: Well, I honestly think that Iris is a much worse cook because in Flash season five, episode 4, she literally can barely even make a banana for Barry, more or less a perfect breakfast for Nora. Which I do sorta feel bad for her about because she was honestly trying.

Though, Felicity comes in as a close second as to who I think of first as a bad chef for the whole line of, "Felicity Smoak, you have failed this omelet."

It gets me every time :)