Gordon Ramsay and Christina Tosi invite stars and past "MasterChef'' contestants to participate in culinary showdowns where the winner receives a cash award to donate to a charity; participants include Gigi Hadid, Terry Crews and Rebecca Crews.

In the final challenge in the MASTERCHEF kitchen, the Top Two home cooks will have one last chance to prove to the judges that they deserve the MASTERCHEF title by creating a three-course meal. After evaluating the final dishes, the judges will reveal America's next MASTERCHEF, and the deserving home cook will walk away with a MASTERCHEF trophy, a book deal and the $250,000 grand prize.

In the next challenge, with a little help from a few other home cooks, the remaining three contestants will create dishes for 30 restaurant guests who serve an important role in the judges' culinary world. The home cook with the most number of votes will move on in the competition, while the remaining two home cooks will face the next pressure test, during which they must complete three classic MASTERCHEF dishes. The home cook with the best dishes will move on to the finals.

The teams must create a unique appetizer and entree three times by using special ingredients; the pressure test has the chefs re-creating Christina Tosi's chocolate malted layer cake.

The Top Five home cooks must create a dish using pear, blue cheese, tomato, portabella mushroom and chocolate.

The remaining chefs are put into teams to take over a Los Angeles restaurant, where they have to come up with two appetizers and two entrées for dining customers. The losing team take part in a pressure test that sees them having to come up with three different pasta dishes.

The cooks need to make a dish that features coffee as one of the central ingredients. The pressure test sees the contestants teaming up to re-create an elaborate party platter.

The cooks split into teams to prepare vegetarian meals; the pressure test has the cooks creating meals composed of cuts from an animal's head.

The contestants must prepare a flambe; the challenge winner selects which Southern dish the contestants will cook.

The cooks prepare family-style meals for special diners; the cooks create a gnocchi-in-brown-sage-butter-sauce dish for the pressure test challenge.

The remaining home cooks enter the Wild West when they must cook for 101 cowboys and ranchers.

The remaining home cooks must create a rice dish in 60 minutes.

The chefs must taste and then attempt to re-create Gordon's signature beef Wellington.

Each team has to create a two-course menu and they must also make a three-layer birthday cake.

The home cooks must create an elevated breakfast dish in 45 minutes; the challenge winner receives advantages that include immunity in the mystery box challenge, in which the contestants must make TV dinners.

The cooks travel to Las Vegas and split into two teams to prepare food for 101 performers; the better-received team is safe from the pressure test; the cooks face steak challenges that measure temperature and taste.

The cooks compete to prepare the best crab dish, with the winner gaining a significant advantage before the elimination; the cooks create versions of dishes using corn.

The teams create their own versions of an amusement park burger and a fish and chips dish for park guests; the losing team faces a cinnamon roll pressure test.

The contestants are faced with their first mystery box challenge that includes ingredients that could be found in the average home; in a pressure test, contestants must prepare their version of an apple pie.

Some of America's best home cooks present their signature dishes to the judges: Gordon Ramsay, Graham Elliot and the newest addition to the panel, Christina Tosi.

Forty of America's best home cooks present their signature dishes to the judges: Gordon Ramsay, Graham Elliot and the newest addition to the panel, Christina Tosi.