"Wasn't mentioned to us during the awkward, painfully slow, grating at the table."
Since posting an image of her receipt, others expressed their confusion at the charge, while also questioning the "unreasonable" gratuity fee tacked onto the bill.
"Never heard of such a thing," one woman wrote.
"What's next? An extra charge for salt and pepper?" one man questioned.
"A service charge and a line to add a gratuity? Cake and eat it," another added.
However, the restaurant's head chef, Mitshel Ibrahim, has defended the extra charge saying it's on the menu, and posted an image of the menu in response to French.
Following the fallout, French said the reaction has "illustrated the insanity of the internet and just how strongly people feel about cheese".
"This parmesan thing is out of control! I asked @jayrayner1 what he thought (without naming the restaurant) as knew he'd set me straight if this was the norm in London. Turns out most consumers feel extra parmesan should be factored into Italian restaurant margins. The end."