Does anyone buy the gargantuan bags of rice and flour at Costco? I've wondered about this, but have been too scared to take the leap.
I buy the giant (25lb) bags of jasmine rice. It gets pretty soft compared to some other jasmine I've had, but I like it. The basmati they carry is FANTASTIC though. I bought the 10 or 20lb bags of basmati for a long time and really enjoy it. DH prefers the jasmine, though, and it's cheaper, so we've been buying it.
Never done the flour, as we don't really use any.
I do a lot of Coscto shopping in general. Canned chickpeas (for quick snacks... for hummus I do from dry), cheese, milk, butter, eggs, salsa in the big tubs, frozen stir fry veggie mix, chicken stock, aforementioned rice, sometimes lamb... We recently started doing sour cream from there too since they stopped putting stabilizers in it so it's just cream now.
We also do our local albertsons for produce and some canned goods like canned pumpkin and canned roasted peppers. We also check the manager's special meats every time we're there, and if grass fed stuff is cheap enough, pick it up. Otherwise most of our meat comes from hunting (venison and elk).
We do trader joe's for things like cream and certain veggies that seem to be loss leaders- we get carrots, celery, green onion, romaine, broccoli, and brussel sprouts cheaper there than anywhere else.
We also have a local discount store named Grocery Outlet. They vary what they have a ton, but it's always the cheapest source of wine by far. Sometimes dark chocolate bars, sometimes cheeses. Always cheapest for dried chickpeas.
Our general strategy is to do Coscto once per month to get staples, and walk to the albertsons once a week or so (sometimes twice, depends on what we need). We do trader joe's/grocery outlet more often in the winter since we drive there, and the price difference is most dramatic this time of year.
I don't have an official "price book", but just keep it in my head.
Oh! We also do amazon subscribe and save for some stuff (15% off). I watch the coupons on there, and stock up accordingly. Tea, lara bars, seaweek snacks, supplements, etc.
We're still working on our grocery spending though, it's very much a work in progress. We eat like hippies, not really anything processed, cook every meal from scratch, do local and sustainable as much as possible, etc.