The Duchess Of Cambridge Shared A Rare Family Video Of Her Kids Baking Cupcakes For A Platinum Jubilee Party

In the video shared by Kensington Palace, the Cambridge kids (and mom Kate) make desserts for a Jubilee street party in Wales.

Catherine, the Duchess of Cambridge (aka Kate Middleton), and her children — Prince George, Princess Charlotte, and Prince Louis — cooked up cupcakes for a special Platinum Jubilee celebration in a video released by Kensington Palace.

According to the caption, the sweet treats were made for a street party in Cardiff, Wales, in honor of the Queen's 70 years on the British throne.

Princess Charlotte and Prince George pouring ingredients into a bowl

On Sunday, people across the UK gathered for "Big Jubilee Lunches" in their communities to celebrate the Queen on the final day of the holiday marking her historic reign.

On the final day of the #PlatinumJubilee Celebration Weekend, millions of people across the UK will take part in the #TheBigJubileeLunch, bringing together communities as they share friendship, food and fun. Are you going to a Big Jubilee Lunch? Share you pictures with us! https://t.co/w4ZzY4ZumR

Twitter: @RoyalFamily

The cupcake-baking video was likely taken Saturday in the kitchen of the Cambridges' residence at Kensington Palace, before the family (minus Louis) traveled to Cardiff, Wales, for a Jubilee royal engagement.

George, who is 8, Charlotte, 7, and Louis, 4, appeared to be having a blast while cooking with their mother...

The children decorating cupcakes with their mother

...especially Charlotte.

Charlotte and Kate Middleton laughing at each other

The Cambridges rarely show behind-the-scenes family moments with the public, so the video was a Platinum Jubilee surprise.