The American baker tasked with preparing the royal wedding cake is revealing her process.
Claire Ptak, who was raised in California, focuses on the use of seasonal and organic ingredients in her cakes. She moved to London 13 years ago, where she now owns the popular Violet bake shop.
She selected to make and construct the lemon-elderflower wedding cake for Meghan Markle and Prince Harry's big day.
Elderflower originated during the Victorian era, and pays homage to Harry's regal roots.
Ptak with her team of 10 bakers will construct the final cake on site at Windsor Castle the morning of the wedding.
"We are very excited," she told Inside Edition Friday. "It is going to be great."
She added that she hopes it will be delicious, but refrained from further details, saying the world will see it Saturday.
The cake is a major departure from tradition, which is the recurring theme of this wedding.
Chef Darren McGrady cooked for Princess Diana and has known Harry and Prince William and since they were infants.
"Prince Harry, I held him as a baby at Windsor Castle while Princess Diana was eating cereals in the kitchen," he told Inside Edition. "For centuries now, British wedding cakes have always been heavy fruit cakes, and for the royal family too — everyone has had a fruit cake. Even William and Kate had a fruit cake."
Saturday’s cake is made of 200 lemons imported from Italy's Amalfi Coast.
The other ingredients are 500 organic eggs from a farm in Suffolk, England, 45 pounds of butter, and 45 pounds of sugar and 45 pounds of flour.
Ptak will add in 10 bottles of elderflower liquor from Queen Elizabeth's personal reserve.
Markle and Ptak have a history. In 2015, the princess-to-be interviewed the pastry chef for her now-shuttered lifestyle blog, The Tig.
It has also been revealed that there will be no formal sit down for the newlyweds as the food at the reception will be kept simple, for a good reason, says celebrity Chef Gordon Ramsey.
"It is hard to eat at a wedding," he told Inside Edition. "You want to dance. You don't want any spinach in your teeth."