How do you actually keep your grocery budget consistent when you meal prep every week?
My grocery spend swings 20 to 30 dollars week to week and it is driving me insane. I have a spreadsheet. I track cost per serving. I plan meals before I shop. And I still walk out having spent more than I meant to almost every other week.
The main problem is protein prices. Chicken thighs are one price this week and a different price next week, and I have not figured out a system that accounts for that without just buying whatever is cheapest and then scrambling to build a prep around it at the last minute.
I tried building a flexible meal plan where I swap proteins based on what is on sale, but that only works if I already know what I am making with each one. If I do not have a plan for ground beef ahead of time, I end up buying it anyway and then burning mental energy figuring it out in the store parking lot.
Curious how people who prep consistently handle this. Do you set a hard number and cut something if you go over? Do you stockpile when prices drop? Do you have a backup prep that works with almost any cheap protein so you are never stuck?
ETA: I am not trying to meal prep on 25 dollars a week or anything extreme. I just want it to stop being a guessing game.