[identity profile] ejmam.livejournal.com 2015-11-01 02:27 am (UTC)(link)
It is much easier to wipe jam off the knife before switching to peanut butter than the other way around. This is important when you are running low on silverware and the lunch boxes need to go out the door in the next 5 seconds. So, jam first, then peanut butter.

Two knives is another option, but that seems wasteful.

[identity profile] xiphias.livejournal.com 2015-11-01 03:00 am (UTC)(link)
See, I've never found that to be true, not when I'm using a jam with some texture to it. If it's more like a grape jelly, sure, but if it's something with actual chunks of fruit in it, it tends to be a lot easier and faster for me to do the peanut butter first.

I can't think of a single time in my life I've used two knives for making PB&J. I've used a spoon and a knife before, when I was scraping out the last bits of a jar, or counting calories so measuring amounts of each, but never two knives.