In the United States, Costco has recently added an exciting new dessert to its food court menu that is positioned as a competitor to the beloved Shamrock Shake from McDonald's. The new item, a $3 Double Chocolate Mint Sundae, features layers of soft-serve mint ice cream, cookie crumbles, and chocolate sauce. This item became available within the past week, generating significant buzz on social media as influencers and customers shared their experiences with it. Social media users have expressed their enthusiasm for the sundae, with many praising its minty flavor and the delightful texture provided by the cookie crumbles. A notable post from a Costco influencer known as @Costcobuys showcased the dessert, prompting numerous positive comments from followers who enjoyed the sundae. Some customers have highlighted it as a perfect reward after physical activities, underscoring its appeal as a sweet treat. In addition to the new sundae, Costco has also made mint-flavored soft-serve ice cream available on its own for $2, giving customers who may not prefer the sundae a chance to enjoy the mint flavor. Previously, the food court had offered chocolate soft-serve, but it has temporarily been replaced by the mint option. Costco has a history of changing available flavors, including a stint with strawberry soft-serve in 2024, demonstrating its willingness to innovate and keep the menu fresh. The introduction of the Double Chocolate Mint Sundae coincides with the annual return of McDonald's seasonal offerings, specifically the Shamrock Shake and the Oreo Shamrock McFlurry, just ahead of St. Patrick's Day. McDonald's Shamrock Shake features vanilla soft-serve blended with a minty syrup and is topped with whipped cream. Meanwhile, the Oreo Shamrock McFlurry builds on the classic with added Oreo cookie pieces. This competitive landscape for mint-flavored desserts showcases both retailers’ efforts to attract customers with seasonal treats while navigating shifting consumer preferences. As Costco continues to diversify its menu offerings, it also faces challenges related to return policies which have recently become stricter, reflecting a broader retail trend to minimize losses from fraudulent returns.