I agree that this sort of memory loss is more common with TIA (mini-stroke) than Alzheimer’s.
My mom’s been having these sort of memory gaps for a couple of years now, weird little stuff like saying she’s “always and only ever used Dawn dish soap.” (No, Mom, we always used Palmolive. I don’t know when you switched to Dawn, but it was after you were 50! It doesn’t “matter,” but it’s…disconcerting. And it can indeed be a sign of a problem if it’s more than just an occasional thing.
Just a few months ago, my mom had a TIA when she was with me. Nothing big and dramatic, no physical impairment, no face drooping, no weakness, no slurred speech, just…words were gone and gibberish replaced them for a few seconds, and then she couldn’t tell me what color my car was (I wasn’t actually interested in if she knew the color, I was trying to get her to say “white” to test her control over her facial muscles, but when she answered, “Red…no, blue!” while looking at the white hood of the car, I knew we had a problem.) When we got into the ER, they scored her very low on the stroke scale because she was able to talk to them and give them a list of medications from memory…but it wasn’t her list, it was her mother’s medications. She was completely docile and compliant, which is not like her at all. She patted my hand in a way she’s never done in her life, and said, “It’s okay honey, I’m fine, really I am,” in my grandmother’s voice. Weird scary stuff that’s very hard to assess as abnormal if you don’t know the person well. Testing did find areas of ischemia (stroke) in her brain, multiple small areas of dead brain. Turns out she’d been having some “funny” moments with gibberish for the last month or two that she and everyone else laughed over and called “senior moments.” Those were mini-strokes.
So, yes, I agree that first find out if your mom meant something else, like a pressure cooker, or if she didn’t know that Crock-Pot is a brand name of the slower cooker she’d used. But if that does not turn out to be the case, please do get her into the doctor for a good looking over. She might need a cardiology or neurology consult to look for and/or rule out other potential causes of memory loss. And if it does turn out to be early Alzheimer’s, you need to have a treatment plan set up sooner, rather than later. That may not mean medication right away, but you should form some sort of plan with her doctor for monitoring to decide when it is time to start medication.