I can't get over the fact tons of us used to think Ferrero Rochers were some delicacy for millionaires, but in reality can just be bought for under $10 at the average supermarket
If raw, they would be much harder to bite into when compared to what a person would expect from a chocolate. Thus, it would be really easy to recognize something was off before you had sunk your teeth in enough to be fully committed. Meaning, a person could very likely just quickly spit it out before getting a good bite.
If cooked, then the softness would make it so you're already all in and you'd get way more sprout all throughout your mouth. Even better would be to cook them so they are super-soft and would immediately become mush in the mouth.
It might be possible to make this taste good. I've made good food with weirder combos. All it needs is a good bridge ingredient that can combine sweet and savory (balsamic vinegar and wine are great ones).
Could also infuse the brussels sprouts with some flavor while cooking them.
If I were the dad I'd get tricked once... then keep the evil one and use it as weight comparison point for all others. I don't need to unwrap any. The light ones, if there are any, are the good ones. I'd do that while looking in her eyes grinning knowing how long this little ordeal took for her to make.
I wonder how long you can safely, and in good consciousness, leave these without being eaten before you have to say something. Like if you trick your dad into accepting the switched out Sprout Ferrero Rochers but he doesn't open them for three weeks should you squeal?
the sprouts are a similar size and shape to those chocolates, and theyre hidden under the gold wrappers, meaning the actual chocolate isnt visible from the outside. So, they can remove the chocolate, wrap the wrappers back over the sprouts, and put those back in the package so as to make whoever it is given to think theyre getting chocolate, until they unwrap one.