Costco kirkland sparkling wines ranked: 2 traps and 1 hidden treasure

World of Fine Wines
May 2, 2026

Costco champagne secrets, decoded by a sommelier. Three Kirkland Signature bubbles wine review from Costco — including one Kirkland champagne that simply shouldn't exist on a $20 shelf. What not to buy at Costco, what's actually worth your money, and the producer fingerprints hiding on every bottle.

Most people think cheap sparkling wine means a headache in a bottle. At Costco, you're either buying a cooking wine or a Grand Cru masterpiece in witness protection — there is no middle ground. Kirkland Prosecco, Kirkland Prosecco Superiore DOCG, and Kirkland Champagne Brut — three bottles, three completely different stories.