But the Duchess stays up rather late to maintain the family tradition.
The mother-of-three said: “I love making the cake.
“It’s become a bit of a tradition that I stay up ‘til midnight with ridiculous amounts of cake mix and icing and I make far too much.
Kate Middleton’s ‘midnight’ birthday tradition for George, Charlotte and Louis laid bare
Generic image of a birthday cake
“But I love it.”
The Duchess also told Mary Berry, 86, young Prince Louis, three, would “definitely” recognise the former Great British Bake Off judge.
She said: “One of Louis’ first words was ‘Mary’ because right at his height are all my cooking books in the kitchen bookshelf.”
Kate added: “And children are really fascinated by faces, and your faces are all over your cooking books and he would say ‘that’s Mary Berry’.
“He would definitely recognise you if he saw you today.”
But Ms Berry also complimented the Duchess on her baking capabilities.
The veteran baker said: “I remember we were down at the RHS at Wisley and she was bringing her garden from Chelsea, the children’s garden and play centre.
“She was piping cupcakes and they were just… if not better than mine, they were beautiful and she was laughing away and enjoying it.”
Duchess of Cambridge
Ms Berry added: “I think she’s a great person, she’ll have a go at anything.”
The Duchess would have completed her birthday baking for George, Charlotte, six, and Louis for 2021 after her eldest son turned eight in July.
She will have to wait until Prince Louis’ fourth birthday on April 23 to continue the Cambridges’ tradition for the children again.
Source: EXPRESS CO UK