I do not know if this is a bug or an intended feature, but if it is the latter it renders all food-focused businesses in the newest pack completely unviable.
In attempting to create a bakery today...
Ideas
I was doing this too but it doesn't work on cupcakes or any of the cotton candy or lollypops as your sim will just try to eat them instead of putting them in their inventory.
In my game, the candies are at a fair price. I made a batch for 25$ and it sold for 350$. If my sim ate one serving, the price went down accordingly. I still think that every batch of food made should be bought by serving, like with Home Chef Hustle.