From sea salt to almond butter, these under-the-radar Kirkland items are Costco cult favorites for good reason.

If you’ve ever shopped at Costco, you’ve likely purchased something from its premium in-house brand, Kirkland Signature, which has become a household name and a great way to save money.

Kirkland Signature hot dogs are probably the best-known example of Costco's vertical integration approach to controlling costs. In an interview with CFO Dive, now-retired Costco chief financial ...