Royal Baking Powder
We’re no marketing experts, but if you ask us, cake is one of the easiest things you can sell (much like french fries, for that matter). All you need to do is show me a picture of a cake, and I’m sold. When the cake is the size of a building, it’s even better (‘the bigger the better’ concept works here as well).
It’s so simple, which is precisely what makes it brilliant: what better way is there to advertise baking powder than showing a giant layered cake? It looks like the upper right apartment didn’t approve of this advertisement (what’s not to approve of baking powder?) and weren’t willing to give up their window for this, but it actually worked for the best, since now it looks as if someone couldn’t resist the temptation took a bite.