Nobody leaves Costco with only what was on the list. You walk in for paper towels and a rotisserie chicken, and somewhere past the pallet of protein bars the math starts whispering at you: bigger container, lower price per ounce, Kirkland label on the front, how could that possibly be a mistake? Usually it isn’t. But a short list of items in that warehouse quietly takes your money and hands back waste, mush, or flat-out disappointment. The single worst one is not even a food you’d think twice about tossing in the cart. It’s the spice tub.
1. The Warehouse-Size Spice Containers
Spices don’t rot. They go flat, which is worse, because nothing warns you. Ground cumin, paprika, oregano and garlic powder lose their potency slowly, and the aroma goes first. McCormick gives ground spices two to four years and dried leafy herbs one to three. The problem with the warehouse size is arithmetic: a household cooking a few nights a week can sit on one of those containers long past that window. By the bottom of the tub, you are shaking beige dust into a pan and calling it seasoning.
The per-ounce price is genuinely lower. The per-useful-ounce price is not, because you are paying for a pound of cumin and using the last of it long after the flavor has gone. Everything you cook from the back half of that tub is slightly worse than it should be, and you never connect the dots, because the jar is right there and it looks fine.
Buy spices in small jars at a regular grocery store and replace them when the smell fades. The two exceptions worth buying big are salt, which doesn’t degrade at all, and whole black peppercorns, which hold their bite far longer than anything pre-ground. If you cook at restaurant volume, make huge batches of chili weekly, or grill all summer for a crowd, the big container earns its shelf space. For everyone else it’s a slow leak.
2. Costco Bananas
Costco bananas have one job and they routinely refuse to do it. The complaint repeats across shoppers and across years: the bunch sits green on the counter for a week, then skips the yellow, sweet, ready-to-eat stage entirely and goes straight to spotted brown. There’s no window. You never get the banana you bought.
Nobody has pinned down why. Every export banana is picked green, shipped cold and ripened with ethylene gas, Costco’s included. Whatever the cause, the result is the same: a bunch that goes from inedible to compost with nothing in between.
A deal stops being a deal the second the fruit hits the trash. Buy bananas at a regular supermarket where the ripening is predictable, and if you want them for smoothies or banana bread, buy already-ripe ones somewhere else and freeze them in portions.
3. The Deli Tortellini Pasta Salad
On paper it should work: cheese-stuffed pasta, cured meats, little pearls of mozzarella, olives. In the tub it’s a letdown. The tortellini comes out overcooked and mushy, the dressing is bland and there’s far too much of it, and the whole thing turns greasy once you add big chunks of cured meat and cheese to the pile. Sliced black olives are doing the work that fresh herbs or actual vegetables should have been doing.
At $5.49 per pound for a bucket-sized pasta salad, the expectation is a side dish that carries a cookout. This one needs salt, acid and something green before it’s worth eating, which defeats the entire point of buying prepared food. Most Costco regulars have landed in the same place on it, and they’re right.
4. Kirkland Signature Frozen Chicken Bakes
The food court chicken bake is a legitimately beloved object. The frozen box version is a different food wearing its name. The common complaints are that they come out dry, they’re short on filling, and they’re noticeably smaller than the one you get at the counter. More than a few shoppers compare them to a Hot Pocket, which is not a compliment when you paid for a Costco chicken bake.
There’s also a recipe change nobody asked for. The frozen version puts green onions in the filling, which the food court version doesn’t have, and that single difference is enough to annoy people who bought the box specifically to recreate the original at home.
Skip the freezer case and buy the real one on your way out. Nothing in the box is close.
5. Kirkland Signature Artisan Crust Pepperoni Pizza
The box talks a good game: whole milk mozzarella, Italian-style tomato sauce, a parm and Romano topping. What people actually report is a thin, underwhelming crust and pepperoni spread thin enough to count. The crust draws comparisons to school cafeteria pizza, which tells you everything about the texture.
Price is the one argument in its favor, at less than $5 per pie, and that argument falls apart fast. These aren’t filling, and two adults can finish one in a single sitting without trying. That makes it an under-$5 dinner for two people who are still thinking about ordering something, which is not what you came to the warehouse for. Longtime buyers also miss the version that came before this one, and that nostalgia shows up in review after review on the frozen pizza.
The Bulk Buys That Expire Before You Finish Them
The 64-ounce jar of mayonnaise is the classic trap. Once opened, mayo is best used within about two months, and a household that puts it on occasional sandwiches and a summer potato salad is looking at five or six months to get to the bottom. Buy the 30-ounce jar at the supermarket and replace it more often. You’ll spend more per ounce and less per ounce you actually eat.
Olive oil is the same story with a nicer label. A three-liter bottle that takes eighteen months to empty is not the same oil at month eighteen that it was at month one, and the better the oil, the more obvious the slide. A standard 750ml or 1-liter bottle covers most kitchens for three to four months, which is the window that matters. Save the big bottle for the year you’re hosting Thanksgiving.
Two more: a big bag of whole wheat flour, which turns rancid quickly at room temperature because of its natural oils, and delicate salad greens. A big clamshell of spring mix starts wilting within days of opening, and a couple eating salad twice a week is never going to beat the clock. Frozen produce and hardy stuff like carrots, apples, potatoes and cabbage are where the bulk strategy actually pays.
Two More In The Deli Case Worth Walking Past
Costco’s mac and cheese manages the strange trick of being too rich and too greasy while still tasting bland. The cheese blend is there, the salt and pepper are not, and by the time you’ve doctored it enough to serve, you could have made your own.
The shepherd’s pie loses on texture. Shoppers describe a mealy potato topping, overcooked vegetables and a mushy filling that some find oddly sweet. It’s also not a shepherd’s pie. It’s made with beef, which makes it a cottage pie, a distinction that matters enormously to the subset of customers who notice. Over in the meat department, the chicken breasts draw their own steady stream of complaints for coming out tough and stringy, enough that some shoppers have moved their poultry money elsewhere.
What To Put In The Cart Instead
The rotisserie chicken is still the best thing in the building. Three pounds each with bones in, enough for three or four people, at $4.99. Listen for the bell while you shop, because that’s a fresh batch hitting the case, and Costco pulls any bird that has sat for two hours anyway, so a miss costs you nothing.
From the same deli, the meatloaf with mashed Yukon potatoes and glaze runs $3.99 per pound and goes straight into the oven in its tray. One Costco worker has described it as scratch-made each day from freshly ground beef and onion, and it eats like it. The chicken street taco kit is the other reliable one, roughly $15 a package at $5.49 per pound, with enough chicken, corn tortillas, cheese, slaw, salsa and lime crema for twelve tacos.
In the freezer, go for the fruit and vegetables rather than the entrees. Frozen berry blends, organic vegetables and edamame keep for months in the freezer and don’t spoil on you, which makes the bulk size an advantage instead of a liability.
If you only cut one thing from the list, cut the spice tub. The frozen pizza is a $5 disappointment you’ll forget by Thursday. The spice container is a years-long commitment to worse cooking that you paid for up front and will throw away half-full, which is the most expensive kind of bargain there is.
