There's something that looks like a glass shelf, inside the kitchen along the window where customers wait. What is that?
Yes, thank you!
This is the Magic Cupcake shelf! This is a new feature we added to the game. You can fill your cupcake shelf from the level start screen.
Each time you fill it, you will receive 5 cupcakes. When you don't want to cook a difficult dish or if you don't want the customer to run away, you can just take one of these and give it to the customer, no matter what they ordered. They will pay you fully and leave happily! So basically, the Magic Cupcake is a joker dish you use during a level.
Hope this helps!