Bee Yinn Low, who writes under the Twitter name Rasa Malaysia, took to the microblogging site to confront Quah after a fan told her that he used her black sesame seed dumplings with ginger syrup during his time on the Australian cooking show and claimed it as his own.
She first wrote on her Twitter page: "A reader told me that a AU MasterChef contestant stole my recipe and posted on his blog, NO CREDIT. He even made it on the show! WTH! (sic)"
Low then wrote to Quah: "WOW u took my Black Sesame Dumplings recipe, copied it word-by-word w/ minor changes & made it on national TV with no credit?"
He replied: "Hey bee, is it a mistake? I promise it's mine. No copying here. Mum use to make it for me," to which she wrote: "Ur mum wrote the recipe the same way as I do, word by word?!"
Low later revealed that she has "captured the screenshots" of his recipe in case he amended his, adding: "Plagiarism, no credit & on TV is not OK (sic)." He then reportedly changed his recipe, causing Low to write: "cinnamonalvin updated his recipe but I've screen grabs. If he didn't copy the recipe, why the need 2 change? That's all I'm going to say."
Quah has since told the Herald Sun that he is "confused and disappointed" by Low's claims, saying: "Most Malaysian homes would have it once a week. The recipe is the same as mum taught me growing up and passed on to me.
"There are different variations, but it is very common and most families have a version of it. Maybe her mum used to make it the same way."
Quah came in sixth place in MasterChef Australia 2010. The competition was eventually won by Adam Liaw.