Five fabulous "Nailed It!" fans visit the test kitchen for a challenge so extra, we had to make it a bonus episode.

'Tis the season to be scary when the bakers try their hands at holiday cookies before constructing an elaborate gingerbread house.

Two high-fashion challenges put the bakers' hopeless skills to the test: fondant-covered doll cakes and an edible headdress heaped with fruit.

Under the watchful eyes of an iconic cake designer, contestants decorate complicated cake pops and a bespectacled, three-tiered wedding cake.

The amateur bakers attempt to imitate the masters with gingerbread self-portraits and a sculpted cake replica of Michelangelo's David.

The bakers summon their not-so-super powers to make Marvel-themed cupcakes with detailed cookie toppers and a daunting "Black Panther" cake.

The contestants turn back time -- and mangle time management -- with inside-out Neanderthal cupcakes and a tropical-flavored T. rex cake.

The pressure's on to make perfectly puffed éclairs and a layered bust of Napoleon Bonaparte for not one but two esteemed French chefs.

The contestants face their fears (with very sharp knives) when they carve an animal out of a watermelon and bend cake into the shape of a snake.

What's scarier than a cook who can't read a recipe? A trio of creepy-crawly bug cookies and a terrifying clown cake that tastes like cotton candy.

Stacked Greek god statue cupcakes and snake-headed Medusa makeover cakes take Herculean effort and skill — and these awkward results are epic.

Putting their own spin on travel, the bakers make terrible spiced-doughnut tourists and deflated hot-air balloon cakes. It's destination disaster.

Contestants loosen up a food scientist with a cupcake-cocktail pairing before serving him questionable slices of a bubbling volcano cake.

Dogged contestants are seeing double when they're asked to paint their portraits on a cookie before building an edible bust of Donald Trump.

The contestants raise the bar with two half-baked "high society" challenges: late-night munchie-inspired pancakes and a gravity-defying tea cake.

Baking duos go off the deep end with desserts inspired by the wonders of the ocean, including marine animal mini cakes and enormous edible octopuses.

Two daunting desserts -- a chocolate-filled "hot tub" and an open-mouthed shark cake -- have the hapless home cooks struggling to stay afloat.

A YouTube star known for her fondant work watches the bakers try to copy two of her most popular Japanese-themed cakes.

The cooks divide and conquer to fill sections of a savory snack stadium before building a cake that looks like a barbecue grill.

It's a Ferris wheel of fails as the teams make treats with a state-fair theme — from caramel corn knockdown-doll clowns to roller-coaster cakes.

Bake first. Bake hard. Have mercy! The hapless contestants dig deep to make colorful "Cobra Kai" soft pretzels and a Halloween dance fight cake.

Space-themed challenges throw the hapless bakers for a loop when they're asked to make cosmic cupcakes and a supersized solar system cake.

Candy-jeweled brooch cookies? Inviting cookie-jar cakes? These sugary sweets are just like the ones Grandma used to make — if Grandma couldn't bake.

From splashy cereal-bowl cakes to towering hamburgers with fries, these attempts at hyperrealistic treats are so bad, you won't believe your eyes.

The bakers do their best to make jelly-filled doughnuts fit for a pirate before tackling an edible tower with a princess on top.