Why don't supermarket cakes have that familiar scent anymore?

[SupermarketCake]

Ever since the ban on partially hydrogenated oils in 2018, the supermarket cakes (particularly the chocolate cakes with chocolate frosting...I don't remember whether the vanilla varieties had the same scent, as I haven't eaten as many of those) no longer have that overpowering scent they used to have (which was my favorite scent in the world...save the culinary snobbery, not interested).

What's the reason for this? Did the oils being partially hydrogenated rather than fully hydrogenated really affect the scent that dramatically, or might they have changed something else when reformulating stuff? It's hard for me to believe just changing the hydrogenation of soybean, cottonseed, and palm oils would change the scent from overpowering to close to nonexistent.

I want to try to recreate that scent on my own, but I haven't had any luck with what I've tried so far with mixing frostings. I figure the frosting is likely the main thing responsible for the smell, but maybe I'm wrong?

 

[retired baker]

do they even bake in those stores, I doubt it.
If they do its going to be from bagged mix.

 

[Sweet1]

I dont know from where you come from but maybe you can find something here, it seems to me that they have a lot of different cake supplies. You try it, or find some other similar cake supplies... maybe you can find it. good luck x) . I know it is true that the glaze may contribute a lot to the aroma, but the layers of the cake can also play a role. maybe you should experiment with both?