A vegan woman has aired her distress after purportedly finding chunks of beef and dairy-based cheese in her pizza.

The customer bought the pizza from Domino's near Newcastle over the weekend.

In the video above, Domino's launches meat-alternative pizzas

She went to eat it but noticed there was clearly real meat on the pizza, as opposed to the plant-based substitute the chain offers.

She returned it and had a new pizza made.

However, she realised she'd again been served real beef, as well as faux meat, when she was six slices in.

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"I was about three-quarters through it and I noticed it wasn’t only vegan cheese and beef but it also had four huge chunks of real beef too," she wrote to a vegan Facebook group.

“Here I am bawling my eyes out.

"I haven’t ate (sic) meat for over five years now.”

'I'm still crying'

She wrote that she again called the store, which sympathised and sent a delivery driver to inspect.

She was offered a refund and an apology but said there was nothing more they could do.

“How am I meant to be ok right now?" she asked the group.

"I’m still crying at the thought I’ve eaten real meat.”

Fast-paced

Many sympathised with her, and others vowed to boycott the fast-food chain, saying it was "unacceptable".

Others, however, pointed out the working conditions and the pressure on workers to cook quickly, saying: "Mistakes happen."

A Domino's spokeswoman attributed the mistake to a "busy store environment".

“As one of the largest sellers of vegan food in Australia, we pride ourselves on providing our customers with more choice," the spokeswoman told 7NEWS.com.au.

'Mistakes happen'

“We have specific procedures in place for customers with vegan and allergen requirements, including using fresh gloves and cutting blades for their order.

"Because of these procedures, we have received positive feedback from customers of our vegan range.

"But in a busy store environment we know that mistakes, though uncommon, can happen.

"Where this is the case, our local store will refund or remake the order as soon as possible."

Customers can also seek out Domino's always-monitored social media accounts if they have complaints.

Domino's added a trio of mock-meat pizzas to its menu in July.