A young woman was caught stealing a McDoanald's condiment tray during a night out with her friends and bragged about it on Facebook

A young woman has been branded the 'dumbest defendant' after being caught stealing a McDoanald's condiment tray during a night out with her friends because she bragged about it on Facebook.

Kyara Blazely, 18, appeared at Darwin Local Court to plead guilty to a single count of stealing related to the incident in the early hours of March 26.

She escaped without a conviction, but was ordered to pay a $150 victim impact levy, according to the NT News.

Blazely stole the tray – worth $72.30 - from a branch of the fast food chain on Smith Street in Darwin after ordering and paying for a meal during a night out.

Prosecutor Sarah Day said Blazely was caught on the restaurant's security cameras and an employee of the branch saw her now-deleted Facebook post.

Alongside a picture of herself with the tray, she reportedly wrote: 'I stole a tray of sugar from McDonald's.'

A few days later, Blazely returned the undamaged tray to the Darwin police station.

The court also heard that she admitted her crime and identified herself as the woman in the CCTV footage during a police interview.

'You certainly win the prize for dumbest defendant today, having a photo on Facebook of you and the tray and saying, 'I stole a tray,' Judge Elizabeth Morris told Blazely during the hearing.

Blazely also admitted that she had returned to McDonald's a number of times since committing the crime.