Costco’s Most Commonly Returned Foods (You Might Be Surprised!)

Costco’s return policy is a shopper’s dream, allowing easy refunds on almost anything.

However, certain food items frequently make their way back due to quality issues like spoilage, off flavors, or manufacturing mishaps.

We’ve compiled a shuffled list of 10 common culprits, including their current prices and key reasons for returns, based on recent shopper experiences.

Milk – $3.89 per gallon

• Often returned because it’s found soured upon arrival home, despite a future expiration date; occasional spoilage occurs even with proper storage.
• Some reports highlight it stays fresh longer than expected, but inconsistencies lead to dissatisfaction.

Berries – $6.99 per 12 oz pack

• Commonly returned due to mold discovered after purchase, as these soft fruits spoil quickly in bulk packaging.
• Past recalls, like for contamination concerns, contribute to caution and returns.

Kirkland Signature Greek Yogurt – $11.18 per 48 oz tub

• Returned for mold issues, following recalls for contamination; affects taste and safety perceptions.
• Undeclared allergens in previous batches have also prompted refunds.

Kirkland Pistachios – $18.15 per 24 oz bag

• Frequently returned because nuts arrive burned or overcooked, impacting flavor and enjoyment.
• Quality variations make them unappetizing for some buyers.

Kirkland Protein Bar – $26.09 per 20-pack

• Returned due to undesirable texture and flavor; high fiber can cause digestive discomfort for sensitive individuals.
• Ranked low among snack bars, leading to buyer’s remorse.

Chilean Sea Bass – $64.68 for 1.5 lbs

• Often brought back for being stinky, signaling spoilage; high cost encourages quick returns.
• Disturbing discoveries like worms during cooking add to the issues.

Marinated Skirt Steak – $13.67 per lb

• Returned because of overly sweet marinade from batch errors, making it taste like dessert instead of savory meat.
• Potential one-off manufacturing mistakes affect overall satisfaction.

Tortilla Fresca Uncooked Tortillas – $10.20 per 36-count pack

• Commonly returned for mold, even when refrigerated or frozen; lack of preservatives shortens shelf life.
• Buyers advise selecting latest expiration dates to minimize problems.

Golden Island Pork Jerky – $15.91 per 14.5 oz pouch

• Returned amid a massive recall in October 2025 for undeclared sesame allergen, posing risks to those with allergies.
• Additional concerns over possible metal contamination from recent reports.

State Fair Corn Dogs – $19.99 per large box

• Frequently returned following a 2025 recall for wood fragments in the product, leading to reported injuries.
• Contamination issues make them unsafe and prompt immediate refunds.