Not a requirement, just an accepted norm. There’s plenty of counter-examples on supermarket shelves, too (and why they all have 写真はイメージです (photo is an illustration only) on the box).

The quality and value of pancake mix really varies between countries. I’ve found that Japan, for instance, has really good pancake mix that is cheaper than buying the raw ingredients… Flour is rarely bought for home cooking, and there’s a generally high standard for store bought baked goods. In contrast, Australia has cheap flour and store bought baked goods are generally mediocre at best.

!shiningforce@lemmy.world approved meme.

Hey now, you’re a wok star, get your flame on, sauté.