If you're on a budget, buying in bulk can save you a lot of money (and a lot of trips to the store). And one of the best places to buy in bulk is Costco. The Washington-based chain has over 500 locations across the country, where you can find everything from giant rotisserie chickens to fancy Lavazza coffee beans to 27-pound tubs of macaroni and cheese (yes, really). Its store brand, Kirkland Signature, also has a cult following for many of its products, particularly its $6.99 bottles of wine. However, not everything sold at Costco is a big hit. There are also some big flops — like the keto pancake and waffle mix from Birch Benders. It may be a healthier, diet-friendly alternative to your standard boxed pancake mix, but according to social media, it may not be worth buying the next time you're at Costco. Here's why people aren't adding it to their carts.