The Internationally-inspired barbecue sauce that Costco fans can't get enough of comes from the brand Bachan's, and is called The Original Japanese Barbecue Sauce. Unlike traditional US barbecue sauces, this sauce has a base of mirin and soy sauce, instead of a tomato and vinegar base, and is flavored with green onion, ginger, and garlic.

Bachan means "granny" in Japanese, and according to Bachan's founder, Justin Gill, the sauce is based on his grandmother's recipe for the "umami-filled, teriyaki-ish" sauce that his family would make during the holidays and give out as gifts. The sauce is now available at Costco stores and has 4.6 out of 5 stars from more than 5,000 ratings on Amazon.

Fans of the brand gushed compliments on an Instagram post sharing the product, with shoppers saying, "This stuff is the bomb," and calling it "literally the best sauce ever" and "a daily staple." However, fans of the sauce may have a limited time to purchase it at Costco, as some observant Instagram commenters noticed that the price tag for the item is adorned with an asterisk.

The asterisk is a secret symbol on Costco price tags — meaning that once supplies run out, the product won't be restocked in stores. Luckily, it's currently being sold in a whopping 34 oz size for $9.79, which should last customers through several barbecues and give them plenty of time to source their Bachan's somewhere else if it disappears from Costco shelves.