of the top of my head, the first attempt at a simple barrier magic creates a dimensional barrier over the entire mansion, she's the first and only to sew magic in clothes which miraculously heal a half dead bird who touched it, her first circulation of magic results in her HOVERING FROM SHEER MAGIC PARTICLES, she easily turns water into ice, makes a tree walk because it's too heavy to carry and she's 'clueless' throughout about how OP she is even though her maid constantly tells her and she herself acknowledges the weird reactions people have. BUT GET THIS EVEN THOUGH she knows ice magic is impossible or whatever she decides to MAKE IT SNOW OVER THE ENTIRE CAPITAL FOR A FEW MINUTES and makes the excuse of oh it's at night and dark no one will notice the ilLUMINATED SNOW in this WARM COUNTRY THAT HAS NEVER SEEN SNOW. I can't. She brushes off it all with oh well my son is happy fufufu

She doesn't want to be seen as a god of food or magic or have any aspirations for having her own merchandise brand, but goes along with such things anyway and 'accidentally lets slip' information that essentially makes people want to worship her, when she knows that's what's going to happen when she opens her big mouth. Does anybody read Quickly Wear the Face of the Devil, or maybe I'm Scattering IQ to the Protagonist, or There Will Always Be Protagonists with Delusions of Starting a Harem? Yeah, those are all yaoi. No, that's not relevant. She reminds me of the 'white lily' protagonists who are actually manipulative monsters. The way everything just always goes her way is extremely illogical. It makes me think that she isn't the idiot, everyone else is by buying in.

I get that, in a world of magic, technology is going to be a bit behind what a world of science would have. However, this world is so incompetent that they don't even have measuring devices for ingredients? And their idea of sweets is piling in expensive sugar for a less than mediocre taste? And queues and proper business management is completely foreign to them? What does magic have to do with those things?! If anything, they should be hella' good cooks, as it's essentially alchemy! On top of that, magic is mostly useless unless you have the protagonist halo, so why the hell would they be so underdeveloped? If it's like this, then they shouldn't be living in buildings! How would crappy magic-reliant citizens know basic construction?! They should all be living in caves, working hard with their inconsequential mana to start a fire! Oh, but how would they know what a fire is, the magic wielding idiots!

... Sorry, I got a bit 'fired' up there. It is the worst sort of world-building, though, when the author makes the world incredibly incompetent just so some transmigrator can come along with basic knowledge and get worshipped for it.

a woman transmigrating into a hysterical woman who had her reasons and was not hated by anyone, quickly getting the trust and friendship of maids, children, and even the allegedly 'cold' husband (lies) through the power of sweets, and was already the perfect mom through her son's eyes pretty much as soon as she first smiled at him. The story isn't about that, it's about getting her ego stroked by anyone and everyone, including the first wife. I understand stories require a certain level of suspension of disbelief, but there's a limit. I honestly feel really cheated.

In my opinion, the ML isn't her husband (I don't know why you think that) but rather the man in her dream (ch 50).

And she doesn't even need that to be an outstanding person! She has an amazing ability and amazing magical power. She doesn't need to invent sweets to make them for her son.

In fact, it would be so so so so SO much more interesting to see her work hard to improve her reputation, instead of having everyone fall in love with her instantly because of a cake or two.