'I like a man in a flower T-shirt': Flirty Nigella Lawson unleashes her feminine charms on MasterChef Australia contestants

She has been labelled the 'queen of food porn' thanks to her flirtatious manner and suggestive descriptions of dishes.

And Nigella Lawson, 56, justified her reputation as a culinary coquette on Sunday night's episode of MasterChef Australia by flirting up a storm with the contestants.

She unleashed her feminine charms on Matt Sinclair, telling the 27-year-old that she liked his grey and pink floral T-shirt.

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Flirty: Nigella unleashed her feminine charms on some of the contestants during Sunday night's episode of MasterChef Australia

During a tour around the kitchen to see what they would all be cooking, she told the coffee roaster: 'I like a man in a flower T-shirt.'

Matt could then be seen blushing as he continued to prepare his dish for the mystery box challenge.

As soon as she arrived in the kitchen, Nigella also let the competitors know she could eat a lot because she was 'wearing something stretchy'.

Flustered: Matt Sinclair (pictured) could be seen blushing after Nigella compliment his floral shirt

Culinary coquette: When doing a tour of the kitchen to see what people would be cooking, Nigella told Matt: 'I like a man in a flower T-shirt'

Something caught her eye! Nigella and judge Matt Preston also spoke to Harry Foster

Wearing a tight, plunging maroon dress, she oozed sex appeal as she sampled a number of delectable dishes, created by contestants.

But it was not all sweetness and light, as she also told off judge George Calombaris after she spotted him eating chicken off his knife.

During the tasting for her mystery box challenge on Sunday night, the world-famous cook was filmed looking aghast when she saw that George was not eating from his fork.

Nigella told him off, saying: 'You just ate with your knife.'

George replied, 'I know. I do it all the time.'

No manners! During the tasting for the MasterChef Australia mystery box challenge, Nigella Lawson scolded judge George Calombaris for eating off his knife

Matt Preston then agreed with Nigella, saying: 'He does it the whole time. Thank you, Nigella. He eats on his knife. It's a disgrace.'

The contestants were put through their paces to create two dishes during the show - one using the ingredients from the mystery box and one inventive showstopper using chocolate as the base.

Nigella chose butternut pumpkin, chicken thighs, pipis, fresh ginger, pancetta, feta and cumin as the ingredients the contestants had to work with.  

Heather Day won the first challenge with her open filo pumpkin pie and was given an advantage in the invention test.

When tasting her dish, Nigella said: 'A rather big mouthful, but never mind. It never stopped me before.

'I think the contrast of textures is fantastic. But more than that, I love the flavours. The smokiness and subtlety means that you keep wanting to go back in for more. 

Not impressed! George admitted that he eats off his knife 'all the time' after he was told off by Nigella

Shocked: Nigella was filmed looking aghast when she saw that George was not eating from his fork

'This is something that creates joy.'

She was put through for the immunity challenge next week along with Karmen Lu and Mimi Baines.

When Mimi Baines presented Nigella with her salted chocolate tart with beetroot sorbet during the second challenge, the cook said: 'I just adore these flavours. This is absolutely heavenly.'

She then fought over the dessert with Matt Preston and went round from the bench to give Mimi a hug. 

'This is my comment, thank you,' Nigella said as she kissed Mimi's cheek.'  

Judge Matt Preston introduced Nigella, saying she was a 'real hero' of his. 

'Never before have we had such a hero of mine fill a mystery box. Every ingredient has been personally chosen by one of the greats of the cooking world. 

'Someone who believes that enjoying food is a way of celebrating life, someone who believes that a kitchen is not just a room, but a flavour palace of sensual delights.'

'Absolutely heavenly'! When Mimi Baines presented Nigella with her salted chocolate tart with beetroot sorbet during the second challenge, the cook said: 'I just adore these flavours. This is absolutely heavenly'

Magical moment: Nigella fought over the dessert with Matt Preston and went round from the bench to give Mimi a hug

Nigella told the remaining contestants that she just wanted the food to 'make her happy'.  

'I want flavours that are bold but not tricksy. I want food that is made to give pleasure, not to impress. 

'And I want to feel that so much thought and love has gone into the flavour and the textures. It's about balance. And I just want to be made happy when I eat your food. 

A number of the contestants were seen crying in excitement at the thought of cooking for the culinary goddess.

Mimi Baines said: 'It's so amazing to see her in real life. It's like watching an angel walk through the room.

'It's honestly probably the best day of my life so far.' 

Miles Pritchett, Chloe Bowles and Jimmy Wong will all be up in the elimination round on Monday night.