HAVERHILL — Before the Red Sox climb aboard Duck Boats for a rolling rally parade through the streets of Boston, they will eat cake.

Not just any cake, mind you, but one specially designed by Erin Erler and her team at Cakes by Erin in Haverhill.

The bakery’s staff was scheduled to deliver the 100-pound edible creation to Fenway Park by 7 a.m. It is the centerpiece of a VIP reception being held before the rolling rally to celebrate the World Series victory.

The cake, a recreation of parts of historic Fenway Park, took all of yesterday and into this morning to complete. It features Wally the Green Monster holding a giant baseball topped by the World Championship trophy, all sitting atop the famous Green Monster wall at Fenway. Other creative touches included an edible section of the park’s exterior brick wall and a doorway decorated with flags and pennants.

“As we work into the night, we’ll add other components, including baseball bats and gloves,” Erler said yesterday afternoon, while refining sketches of her design for the cake. “We’ll add as many features as we can in the time we were given.”

The colorful cake is Erler’s homage to the champions. She said the Red Sox organization contacted her yesterday morning and requested a special cake be made for this morning’s VIP event at Fenway.

“My initial reaction was this is really cool,’’ Erler said. “Then I thought to myself, what do I do and how do I do it?”

Erler and her sister Kelly Mackin own the bakery on Kenoza Avenue, just outside of Monument Square.

Erler said her sister, who is a friend of Red Sox first baseman Mike Napoli, spoke to the Red Sox organization this week and the Sox called the bakery yesterday to place the order. That gave the bakery little time to make a stunning cake.

“It has to look good, taste good and be done in a short amount of time, and that’s where it gets a little tricky,” Erler said yesterday.

Erler and her team brainstormed ideas for the design, and once it had the general theme, baker Erin Soto began making about a dozen red velvet and chocolate cakes, both round and sheet cakes. She also baked champagne, Oreo and red velvet cupcakes, all with different flavored butter cream frosting.

It wasn’t the first time Cakes by Erin has been called upon to create a unique cake for a special event.

Last year, her team made a cake that featured four characters jumping off a cliff for a cast party held for Adam Sandler’s movie, “Grown Ups 2.’’

The team also made a cake for the movie “Ted.”

“We replicated the Ted bear holding a beer can,” Erler said. “It was lot of fun to make.”

Erler makes cakes for the Doug Flutie Foundation every year and also makes cakes for other charitable organizations holding special events.

Her shop created a Stanley Cup cake and Conn Smythe Trophy cake for the Bruins when they won the Stanley Cup in 2011.

“We’re not your average bakery,” Erler said with a smile.

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