SYDNEY, Oct 2, 2025 (BSS/AFP) - Australian convicted murderer Erin Patterson will appeal her guilty verdict for killing three people with toxic mushrooms, her lawyer told a court on Thursday, after a trial that sparked a global media frenzy.

Patterson, 50, was handed life in prison with parole last month for serving a sumptuous beef Wellington laced with poisonous fungi to her estranged husband's parents, aunt and uncle during a lunch at her home in 2023.

Patterson's lawyer Richard Edney told an administrative hearing at Victoria's Supreme Court his client intended to "appeal against conviction".

He did not outline the reasons for the appeal.

Throughout a trial lasting more than two months, Patterson maintained the beef-and-pastry dish was accidentally poisoned with death cap mushrooms -- the world's most lethal fungus.

But a 12-person jury found Patterson guilty in July of murdering her husband Simon's parents, Don and Gail Patterson, as well as his aunt Heather Wilkinson, at her home in Leongatha, in the state of Victoria.

She was also found guilty of attempting to murder Ian, Heather's husband.

Death caps are easily mistaken for other edible varieties and reportedly possess a sweet taste that belies their potent toxicity.