The five-time Star Baker took to his kitchen to whip up a storm for Zaire's 40th birthday treat and, known for his fabulous cake-making skills, it's no surprise the gorilla wasn't shy to tuck straight in!
Even if it did leave her with cake all over her face...bless!
The sweet-toothed primate was treated to all the things she loves most, as Richard conjured up a delight with all her favourite foods - sugar-free jelly, apples, carrots and walnuts - rolled into one.
A lover of pink, Zaire is one big girly girl of a gorilla and, making sure to get her favourite colour into his masterpiece, Richard lathered on pink icing to finish his cake in style.
The builder from London is usually testing out his baking goods on his beloved family, but willing to reach out to new tasters - human or not - Richard didn't hesitate to put on his baking hat for London Zoo's finest.
Speaking about his latest feat, he said: "I was thrilled to make a birthday gift for such a special lady.
"I've always loved London Zoo and am a regular visitor, so it's a pleasure to use my Bake Off skills and help celebrate Zaire's birthday. I hope she liked the treat I created especially for her!"
Well, judging by the pictures Richard, it doesn't look like it lasted five minutes...
We'll take that as a yes then!
See how Richard put together Zaire's cake here:
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Copyright: Rex Features Richard Waters/Solent News