Deathfats aren't really about taste. They're about habit and feeling full. People with tastebuds and the slightest interest in cooking enjoy a wide variety of foods that aren't all fried, overloaded with salt, etc., so they fill up more on seasoned veggies or a nice, juicy grilled chicken instead of shoving dry meat in their gullet because they need to feel full NOW.
I don't believe for one second Amber enjoys any of the hulthy food she pulls out of her ass on camera. She's able to stomach it because it's food, but off camera the only thing that will get her a proper high is a pack of king sized Snickers and twelve consecutive bows of rawmen.
I think even if a professional chef were to put a 5-star meal in front of her, she wouldn't enjoy it. Her tastebuds are conditioned to enjoy unfathomable amounts of sugar and processed crap, it would taste so abnormal to her she wouldn't even get any satisfaction. She'd probably be frustrated by the portion size being equivalent to one Amber bite as well.
But on camera, it would be "so GUD you guise oh my GAWD"