When the package says "add half a teaspoon of butter" or whatever, it's just straight up lying to you. There is literally ZERO perceivable difference between instant rice made with only water, and instant rice made with water plus a little butter. I've tested this myself. If you think the half-teaspoon of butter does some kind of fancy chemistry thing that's necessary for the instant rice to do its thing... No. The butter literally doesn't do anything. Absolutely nothing. Zilch. The package literally just tells you to add butter because market analytics show that if the package tells you the truth — that you really only need to add water — people will be biased to think it's a "worse product". So the butter is literally a placebo! Just a placebo, nothing more! And the same also goes for an enormous amount of instant foods that tell you to just add water plus, very conveniently, exactly one Extra Ingredient™!
How fucking many cows had their boobs fondled all because instant food companies noticed a slight increase in sales if they lied on their packaging? Hell, even for those who used margarine, how much margarine did you end up wasting on a literal placebo? How many teaspoons did you have to wash for no reason?
What the fuck
I think Betty Crocker (or its parent company) did market research in the 50s and found out that people felt guilty for the mix that you just had to rehydrate, it felt extra artificial and removed and like they had no part in it. They fixed this and secured market dominance with their response, the "Just add an egg" formulation. Crack and whisk an egg amd atir it in, and it feels like you're taking part in making it.
IIRC this comes up in The Century of the Self.