Yay! Consider adding a 'puzzle' element to figuring out exactly what the customer wants (e.g. if they're vague or hard to please). I'm specifically thinking of the Ideal Meal minigame from Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy. This could be optional (or could be a way to earn a $ bonus) for those who aren't interested in adding challenge to the cozy vibes.