The bakery is switching to smaller muffins and will no longer offer mix-and-match muffins. Instead of mixing and matching two 35-ounce six-packs of the larger muffins for $9.99, warehouses are selling one 31-ounce eight-pack of an individual flavor for $6.99.

Costco loyalists are known to rave about everything from the food court (with its decades-enduring $1.50 hot dog deal) to the chain's line of exclusive, high-quality Kirkland Signature brand grocery products and even cheap booze.

Costco customers have been left fuming after the store made a change to its much-loved muffins range - and they're not happy about the new deal

This week, Costco’s bakery found itself at the center of an online uproar, as the beloved baked goods section has made a pretty controversial change. In a post shared to Reddit, one member shared with viewers a discovery made at their local warehouse,