Inscription on packets-soups from supermarket states:
Stir the soup-meal into lukewarm water, boil it up, and wait 5-10 minutes. Ready to eat.
Normally the inscription says that you should boil up water and then stir the soup-meal into it. At least for all noodle and broccoli soups I regulary buy.
Whats the reason, that, in my case, a potato-soup and very few noodle soups needs to/should be boiled up in lukewarm water. Can somebody explain the cooking-physics/purpose behind this procedure?
I cannot imagine is has to do with cooking time like other boiling-tagged questions at first made me think (because the inscriptions are different on packets of same company, there seems to be a different reason), I suppose more that those soups would get lumpy/agglutinate? Cannot think of other reasons.