For the experimental meals you need the chef station, but the good news is, it doesn't have to be in your kitchen. I hid mine in a tiny attic room. When I click on it, my sim routes to the normal fridge and use the normal stove. I hope they haven't changed that.
There is also a cc stove that allows you to prepare those meals, it looks like one of the more expensive stoves and can be found here: https://modthesims.info/d/639505/schmapple-oven-with-experimental-food.html (I haven't used it in ages, though.)
*fingers crossed this isn't outdated information*