This thread has been driving me nuts for days.
I don’t know if this is what the OP is talking about, but I have a sneaky suspicion that I might have an idea. I am related through marriage to one of the food columnists in one of the frum publications. And this writer has used that term in her column once or twice. She has been called that term by acquaintances, and has adopted it a little.
In the sense that she used it, it means only that she likes experimenting in the kitchen, and trying new things that give a little variety in the monotonous menu that we sometimes have. I have been with this person on occasion at a restaurant at a family get together, and she spends half the evening trying to figure out how to make herself for cheaper what the professionals charge an arm and a leg for. She likes cooking and baking, and has a little talent there. That’s how she got the job writing for that publication.
I would say that her talents in the kitchen are a serious resume enhancement, even in the frum chareidi world. Anyone here who is looking for a shidduch for their son, and would hear about her kitchen talents and exploits, and says that they would reject her because she is too much into gashmiyus, I would suggest they are lying.