I watched the same Border Patrol show, and the woman did have her resume printed out and in her luggage, so it was suspicious. I think it was the Australian Border Force show, too, not the UK, but I could be wrong.
If you can prove ties to the US and that you have plenty of funds, as you would normally, you shouldn't worry about your cookware. I'm sure any immigration officer would understand the desire to keep up your hobby whilst here. You can get any ingredients here (fondant, etc), but cookware can be pretty expensive, so you might as well bring your own if it fits in your luggage.