The BBQ Beef Brisket Sandwich is one such mystery. After the beloved sandwich was discontinued, Costco never confirmed a reason for taking it off the menu -- but the internet has several theories.

‘The Costco Brisket is waaaayyyy better!’ ... Per the packaging, Costco’s Sliced Grass Fed Beef Sirloin, which Amanda says cost $24, is already cooked and “ready to eat.” ...

Of all the strangely delicious food at Costco's restaurant — hot dogs, pizza, that un-classifiable "chicken bake" — there is one that completely eclipses the rest: the BBQ beef brisket sandwich.

Another day, another Costco debate. This time, one Redditor took serious issue with a meat product available at the big-box retailer. “Don’t buy the smoked sliced beef brisket, it tastes like ...