MasterChef Australia returns with auditions and 40 of the country's best home cooks are ready. Tonight 20 cooks have 90 minutes to cook their dream dish in order to win one of the 10 aprons on offer.

Another 20 home cooks enter the MasterChef kitchen to compete for 10 aprons on offer. For those who miss out, they learn there will be one final chance to cook for the last four aprons tomorrow.

Tonight, the 20 remaining hopefuls have a second and final chance to cook their way into the competition. Just who will score themselves one of the final four places?

Aussie Rock legend Jimmy Barnes set this season's first mystery box, inspiring the Top 24 with seasonal ingredients they love to cook with. Dish of the day will see its maker safe from elimination.

In the first elimination of the competition, 23 cooks will show the judges a window into their homelife, through a favourite dish that they cook at home for their loved ones.

It's the return of a MasterChef classic with an Invention Test challenging cooks to create an inventive dish using cereal.

The bottom five cooks from the Invention Test face off in a Pressure Test set by MasterChef favourite Maggie Beer, tasked with mastering her signature sour cream pastry in a high-stakes pie challenge.

It's Family Favourites week and social media sensation Andy Cooks (chef Andy Hearnden) is on the hunt for the ultimate breakfast, in an immunity challenge cook with 60 minutes on the clock.

In an elimination challenge centred on reinventing the judges' quick carb midweek dinner recipes, mistakes and time pressure sends one cook home.

It is the first team challenge of the series, and the contestants are all eager to see how well they can work together. The bottom two teams will find themselves in the elimination the following day.

Six contestants face elimination as they must create a dish that represent their family food traditions to fight for their place in the competition.

The Top 20 compete for Immunity from tomorrow's Elimination in a fruity Mystery Box challenge set by Catherine Zhang, marking the start of Viral Wonders Week.

Viral sensation Victoria Minell (aka @recipesbyvictoria) sets a challenge to use one of her five viral ingredients in a 75-minute cook to save their place in the competition.

Six teams will compete in their first service challenge, tasked with creating one perfect viral-worthy dish to serve to hundreds of diners, and impress a mystery social media-star critic.

MasterChef alum and social media star Khanh Ong sets an epic challenge to create a bold, out-there sandwich with a banging cross section, to win the first immunity pin of the season.

It's the start of Around the World Week, and global food icon Rick Stein joins the MasterChef Kitchen to set an extra spicy Mystery Box challenge.

In an Around the World elimination challenge, MasterChef contestants must create a dish inspired by a chosen cuisine, featuring a surprise hero ingredient revealed only after they commit.

It's a fusion invention test today with the contestants having to make dish featuring cuisines from two countries.

Chef Rosheen Kaul sets the first full Pressure Test for the season, with an intense, three-hour challenge.

Kicking off nostalgia-themed week in the MasterChef kitchen, social media sensation chef Dim Sim Lim sets a 60-minute mystery box challenge requiring a steamed element.

The MasterChef contestants must cook something connected to their heritage to avoid being eliminated.

In MasterChef's most notorious team challenge, four teams will navigate the chaos of the Team Relay to compete for a chance to cook for Immunity.

Guided by MasterChef Alumna Justine Schofield, four contestants put their French techniques to the test for a chance to win a coveted immunity pin.

It's Perfect Pairings week and today the contestants must choose between two Mystery Boxes. One set by MasterChef Legend Matt Sinclair and one by his Peli's head chef Daniel Dobra, aka 'Dobbers'.

In the second episode of Perfect Pairings week, the home cooks must today select one of five classic flavour pairings to hero as they go head-to-head in an elimination cook off.

As perfect pairs week continues, contestants must work in perfect pairs to create four serves of a dessert inspired by the iconic Reese's Peanut Butter Cup.

Five cooks in the bottom are facing a Time VS Ingredients elimination challenge and the bottom dish will send its maker home.

Curtis Stone kicks off Aussie Classics week, with a once-in-a-lifetime chance for the cooks to have their dish stocked in Coles, as they are challenged to whip up nostalgic Pie and Ice-cream flavours.

With Curtis Stone back in the kitchen, and the MasterChef contestants are challenged with cooking a dish that heroes pork to save their place in the competition.

It's Aussie Classics Week, and there's nothing Aussies love more than a great comeback story. Today, the previously eliminated contestants return for a chance to earn their place back in the competition.

Aussie Classics week draws to a close with an exciting day in the MasterChef Kitchen as guest judge and Aussie icon Robert Irwin sets an Aussie Native Ingredients Elimination Challenge.

It's the start of Sweet Week and confectionary king Adriano Zumbo challenges the cooks to hero a mystery ingredient in a dessert. The top three dishes will win immunity from tomorrow's elimination.

As Sweet Week continues the contestants take part in an Ice Cream Taste Test. The first four who guess incorrectly will land in the Round Two cook, after which someone will be sent home.