Karisha heads to Blenheim Palace to attempt a 10ft-tall wedding cake, Rosie creates a bouncy castle wrapped in fondant and Eloise makes a London double-decker bus birthday cake.

Michelle bakes big for a retiring architect with a cake model of his last project. Nastassja goes for gold with a lovely caramel wedding cake, and Molly makes an edible makeup box.

Michelle works animal magic with a life-sized Koala cake, Molly supersizes her sponges with a fast food cake and Nastassja makes an anniversary cake inspired by Roman columns

Molly sculpts a great white shark cake, while Nastassja makes a sea urchin for a baby shower. Eloise comes up with a rainbow-coloured take on Chelmsford Town Hall for Essex Pride.

Cake makers Phil and Christine must work their magic to create not just a fairy tale cake, but a whole enchanted landscape. Eloise tackles an 18th birthday cake that's just the ticket with a tube train cake. Michelle marks a medical milestone.

Rosie preps a three-foot-long cake to look part dragon and part boat. Nastassja takes on an intricately decorated time piece cake, and Karisha faces a tricky balancing act

Nastassja makes a spiral cake from salted caramel, mango and passion fruit sponge. Molly bakes a fudge cake for Blackburn Hospital. Eloise attempts her first animal creation

Molly makes a hand-painted giraffe cake from gluten-free vanilla sponge. Ben creates a two-foot-wide scale model motorbike, and Nastassja takes on her tallest commission to date

Karisha aims high with a hot air balloon cake with a suspended basket, Molly makes a staggering Hawaiian themed tropical bar, and Ben sculpts a stunning vintage Mini wedding cake

Phil and Christine make a stunning three-foot-long, life-like swimming turtle cake. Ben is asked to make a working windmill cake. And Karisha tackles a challenging Hula Girl cake

Lancashire baker Molly attempts a mammoth build with a 100 kilo life-sized baby elephant that uses 49 kilos of fondant! Phil and Christine capture the nautical charm of a prestigious hotel for its 20th anniversary, including mosaic tiles, sting ray lights - and even the hotel's classic sailing boat. Ben makes a birthday boy see double with his one and half foot high cheeky caricature cake. Sculpted from vanilla cake, it's covered in three kilos of skilfully airbrushed fondant.

Cake engineering boundaries are pushed as Suzanne's birthday cake for a very special 12-year-old hangs in the balance - only a 25 kilo, two foot wide masterpiece will do! Phil and Christine grapple with a tiered forest of poplar trees. Inspired by the location, their cherry flavoured tiers are held aloft by white fondant tree trunks and adorned in more than 700 handmade petal paste leaves, all topped off with festival lighting. Ben tackles an 'S' shaped Chinese dragon with 200 individually applied fondant scales, spines and whiskers.

London cake artist Nastassja gets her groove on with a spectacular exploding champagne bottle birthday cake, made from 20 sponges covered in black buttercream topped with fizzing champagne made from gelatine bubbles. East meets west as Suzanne is asked to make an extravagant pink wedding cake complete with a hand-painted stunning marbled effect. The cultural union of the bride and groom is captured by an English rose and two Indian elephants. Meanwhile, Molly creates a hockey bag cake that sums up the birthday girl's love for hockey and snowboarding and even includes a modelled beagle, all hiding in a deliciously decadent chocolate sponge.

Molly turns to the silver screen to bring a touch of glamour to a 100th birthday celebration. Her creation steals the limelight, with a hand painted 1940s style image of birthday girl Mary staring in her own 100 years movie. Rosie also takes a trip to the movies for her stunning Bollywood dancer cake. Containing 13 kilos of chocolate orange cake and 30 kilos of fondant, the masterpiece takes a whopping six days to make. Eloise heads west with a Canadian tepee wedding cake. Standing three feet high, the cake is covered in hand painted native North American designs.

Lancashire cake maker Rosie battles to stay on track with a replica steam engine cake, with a working track and an intricately decorated engine, it's surrounded by an edible country landscape, complete with a fully functioning model train. Eloise uses nature as her inspiration for a stunning wedding cake, decorating the four foot tall beauty with hundreds of handcrafted edible flowers. And Molly's away with the fairies for a first birthday cake, where she sets herself the challenge of hand sculpting over 40 items, including a fairy's tea party inside the hollowed out tree.

Phil and Christine tackle a technically challenging bake with multiple moving parts for a Thunderbird 2 cake, while Suzanne channels the 1980s with a dance floor cake for a hospice and Eloise takes opulence to new heights with a 40th birthday cake that includes a working gin fountain.

Essex baker Eloise creates a two-foot high edible slot machine for a surprise 90th birthday party, complete with a personalised message, flashing lights and a working coin slot; Karisha tries to suspend a ten-tiered wedding cake from a ceiling; Molly puts some muscle behind her cake.

The gloves are off as Dunstable baker Karisha tackles a boxing themed cake for a charity event, which sees her making two fully edible boxing gloves set in a fondant boxing ring. Molly attempts a deep sea sponge with a giant squid birthday cake for a 10-year-old girl. Phil and Christine make an astonishing solar eclipse wedding cake, that includes a hand painted image of Mount Rushmore and two intertwined willow trees decorated with 4000 hand piped royal icing leaves!

Lancashire based cake maker Molly proves 'that's the way to do it' when she makes a one and a half-foot wide replica Punch and Judy cake, complete with stage, striped awning and a full cast of edible characters as a special surprise for a puppeteer. Suzanne creates a towering five tier white on white intricate hand piped wedding cake with an unusual peplum shaped base. Phil and Christine tackle another challenging bake as they create a picture perfect working projector cake, full of personal memories to celebrate one couple's 25th wedding anniversary and joint 50th birthdays.

It's full speed ahead for Rosie with a vintage car cake for an 80th birthday party, that must replicate the recipient's beloved Bentley Speed Six, as well as reference Le Mans 24 Hour Car Race, as a nod to the car's winning streak in the 1920s. Suzanne keeps it in the family as she attempts to defy gravity with a cake in the shape of a tube of paint, to celebrate her cousin's new exhibition opening. Christine and Phil tackle a very personal African inspired bake, as Christine's invited to the Royal Edinburgh Military Tattoo with an intricate tiered cake to celebrate her old school's unique involvement in this spectacular event.

Former helicopter pilot Rosie battles to create a trio of teddy bears for Armed Forces Day. Nastassja's feathers are ruffled as she produces a flamboyant hanging flamingo cake

Karisha creates an edible assault course with a working zip wire. Molly makes a splash with a three foot-wide floating duckling cake. Rosie goes retro with a Space Hopper cake.

Rosie is caught on the hop with a running man birthday cake for a friend. Molly's set the mammoth job of creating a Gothic wedding cake. Phil and Christine get green-fingered.

Phil and Christine go wild with a bathing baby hippo for Penzance's Mazey Day Festival. Eloise has a double challenge for a baby shower. Molly makes afternoon tea with a twist.

Phil and Christine tackle a puzzling bake as they attempt a giant jigsaw. Suzanne goes off kilter with a wonky castle cake. Ben battles to keep his tractor birthday cake on road.

Eloise is moving heaven and earth for her latest commission. Molly dabbles in fiery fondant for a St George's day dragon cake. And Karisha needs 2000 sugar flowers.