I made a PB&J Tuesday to bring to work but I forgot it. I worked from home today because of the snow, so I'm thinking about bringing it to work for lunch tomorrow.
Will it still be good to eat tomorrow? It's been in the fridge and the bread isn't old enough to mold (the rest of the loaf is unrefrigerated and still good). I don't want to get to work and it turns out to be gross and I have to eat a vending machine granola bar for lunch (we have subsidized vending machines so everything is 50 cents).
48 hours? Hrm. The bread will be pretty soggy. I think it's possible it could be spoilage a bit in there, if your PB isn't sterile and perfectly clean prep and knife you know?
Here's what I'd do. I'd turn that PBJ into a kind of grilled cheese, hot PB, either griddle it in butter, or broil it to toast it. Get it warm. Cool a bit before eating, and have a great creamy beverage to go with it, from cold milk or iced coffee or hot cocoa.
They sell "uncrustables" from Smuckers, where parents can literally pull a PBJ from the freezer right into a morning lunchbox prep, and it's good to go at lunch. If this happens to you often, maybe nail down the method there. Gives you more wiggle room to forget it for a while. For my lunch planning, I buy chicken salad for days 1-3, and then I grate a block of cheddar to a jar of pimentos, mayo and cracked pepper. Pimento cheese sandwiches (or on crackers) is a good pantry staple I always keep on hand. Packaged salami keeps for a long time too before you open it to start doing lunches with.