Last meals help for an 21yo cat

Hello, my cat Cutie is 21 and will likely have to be put down in the next month. She is still having mostly good days and I want her to go while she is happy and not in pain. She is a picky eater and has ibd so I was hoping to get some last meals recommendations. So far on my list is doritos (she is obsessed with cool ranch), oreos, rotisserie chicken, catnip tea, whip cream, and canned tuna.

Update: went to the vet and scheduled to say goodbye in a week