Ralph Kahango

The judges are joined by special guest Jamie Oliver, as the contestants prepare for a season of secrets and surprises.

Jamie Oliver returns to present the contestants with two difficult challenges: a 15-minute meal and his mushroom and spinach rotolo.

It's a race for the last spot in the immunity cook. There are four coloured cloches with secret flavour bombs left by Jamie Oliver, but they won't be revealed until 15 minutes into the task.

It's Grand Finale Day and whichever cook scores the most points across two rounds will lift the trophy aloft, claiming $250,000 in prize money and winning the title of MasterChef Australia 2023.

Poh Ling Yeow presents the season's first mystery box challenge. The contestants must create a winning dish with basic staples and few other ingredients.

Guest chef Donato Toce unveils his delicious Viennetta ice cream cake. The chefs in the stress test must keep their cool to recreate the nostalgic dessert, otherwise they risk having to leave the kitchen.