The ingredients had been perfectly balanced with an optimal icing to cake to filling ratio. The robot was pleased.
It just needed one more thing, but the robot hesitated.
It lifted a bowl of whipped cream, and with an approving nod from a human friend, dumped the contents on top, completely ruining the perfection.
"Now, sparklers!"
Between them, without artistry, six sparklers were stabbed into it. The birthday child was utterly delighted.