The baker extraordinaire noticed that both Prince William and Princess Kate had a competitive streak when the pair went head-to-head to make a sweet treat.
The 88-year-old said she had “such fun” with the pair while overseeing them make and decorate a roulade filled with cream as part of a BBC Christmas show.
The Prince and Princess of Wales previously appeared on the BBC’s A Berry Royal Christmas, a Christmas special along with Mary.
But the celebrity baker told BBC Radio 4’s Today programme that she noticed the pair kept looking at each other’s work, checking who was doing better.
When it eventually came to deciding which one was the best, she called it a draw, joking that she did so to avoid any arguments — a move she agreed was a “diplomatic cop-out”.
Mary described Kate as both practical and fun
Speaking ahead of King Charles’s Coronation ceremony this weekend, she recounted the time that she met the couple when working on the show aired in 2019, adding: “I’ve had such fun with William and Catherine.”
William and Kate were competing to make the best roulade, a meringue filled with cream and curd that is fiendishly difficult to roll.
The Prince was doing the task with the help of chef and author Nadiya Hussain, who won the Great British Bake Off in 2015.
Meanwhile, Mary was overseeing Kate — who she described as “practical, fun, and absolutely delightful” — at work.
William and Kate laughing during the competition
Kate and William took part in activities on Bank Holiday Monday as part of the Big Help Out
Mary continued: “Now, they are a little bit competitive. They were making a roulade filled with strawberries and cream and things — it was a little competition.”
She added: “I can tell you that they kept glancing to see who was doing better than the other one…
“I had to judge – what would you do when they’re almost the same? I said it was a draw.”
In a clip from the show, William interjects, saying “ah” when she calls it a draw. But they all chuckled when Mary added: “I’m not quarrelling with either of you.”
She agreed with Today programme interviewer Mishail Husain that her decision was a “diplomatic” cop-out.
Kate gave William a conciliatory tap on the back after she beat him
William and Kate supported opposing teams at the rugby earlier this year
William and Kate’s competitive nature has come out to play on several royal engagements over the years.
In February earlier this year, William and Kate competed in a spin battle at a local spin centre in Port Talbot, Wales.
Both sweated it out as part of the 45-second endurance race where Kate came out triumphant, taking the small trophy and giving the Prince a conciliatory pat.
The pair have also competed in sailing several times, including during the King’s Cup regatta in 2019 where the Prince and his team were victorious.
The couple took part in another regatta during the controversial Platinum Jubilee tour of the Caribbean in March last year, where William came out on top again after they faced a rain storm.
While Kate is a patron of the English Rugby Football Union, William is a patron of the Welsh Rugby Union which made things difficult when they went to watch England vs Wales in the Six Nations.
Ahead of the match — where Wales lost 10-20 — the Prince of Wales said he thought Kate would not take the prospect of England losing well.
He said: “It’s going to be a tense car journey home for whoever wins. If we win today my wife won’t speak to me. It will be a tense evening.”
Source: EXPRESS CO UK