At least Victor was conscientious enough to not eat the ingredients, but not quite so good at paying attention to what he's doing. I know, he just got a bit excited and happy to have another shot at it. Still, no need to be unhappy because when it comes to eating your mistakes this won't be so bad. Very yin-yang, like the chocolate itself. Who knows? Maybe the color and taste will be fine – or even have some nice swirl effect to make them even more beautiful.
That aside, yeah, this is one of those cases in which making a mistake means learning from such mistake. Not a plot twist of any kind, just a regular situation with a regular guy.