We’ve long known that Costco carries Starbucks' house coffee blend under the Kirkland label, but more recently, the warehouse retailer has added another beloved Starbucks item to its shelves.

To put that into perspective, a bag of Starbucks house blend ground coffee costs $11.95 per pound, and a pound of Dunkin' Donuts original blend is $8.99. Even the majority of the high-end bags of ...