I Tried Costco’s New Double Chocolate Mint Sundae — Girl Scout Cookie Glow-Up! (2026)

Costco's New Dessert Sensation: A Minty Twist on Girl Scout Cookie Favorites

As a self-proclaimed pizza enthusiast at Costco, I never imagined a dessert could sway my loyalty. But the latest addition to their food court, the Double Chocolate Mint Sundae, has me reconsidering my go-to order. This refreshing treat is a delightful surprise, especially for those with a soft spot for Girl Scout Cookies.

The Scoop on the New Sundae

Costco introduced this minty masterpiece in February, causing a stir on social media as some locations received it earlier than others. The sundae features a clever twist: mint soft serve, a temporary replacement for chocolate in their machines. While a mint-chocolate swirl is off the table, a mint-vanilla blend is an option for those craving a milder flavor.

Double the Chocolate, Double the Fun

True to its name, the sundae boasts a 'double chocolate' experience. Layers of chocolate sauce and crunchy chocolate cookie crumbles accompany the mint soft serve. At $2.99, it's a small premium over the regular chocolate and strawberry sundaes, but the unique flavor combination justifies the price.

A Taste of Thin Mints, but Is It?

The sundae's flavor profile is reminiscent of the iconic Girl Scout Thin Mint cookies, though it's not an exact replica. The cookie crumbles, while not Oreos, provide a satisfying crunch and an intense chocolate hit, akin to a Thin Mint sans the outer shell. Costco is generous with these crumbs, ensuring a delightful textural contrast throughout.

A Personalized Treat?

One might wish for a more liberal drizzle of chocolate sauce, especially towards the middle of the cup. However, the amount seems to vary based on the person preparing the sundae. The mint flavor, while not as potent as a Thin Mint, is still enjoyable, especially considering the sundae's generous portion size. The balance of sweetness is spot-on, making it easy to devour the entire cup.

Beyond Costco: Other Mint Chocolate Delights

With the season of mint and chocolate upon us, other fast-food chains are also offering their takes on this classic combination. If you miss out on Costco's limited-time sundae, fear not! Here are some alternatives:

  • McDonald's Shamrock Shake: A long-standing tradition since 1967, this shake offers a subtle mint and vanilla blend that even mint skeptics appreciate.
  • Wendy's Girl Scout Thin Mints Frostys: A seasonal favorite, these Frostys blend your choice of chocolate or vanilla with a minty cookie crumble sauce.
  • Dairy Queen's Mint Chocolate Blizzard: A classic Blizzard with Oreo pieces and mint sauce in vanilla soft serve.

The Verdict

Costco's Double Chocolate Mint Sundae is a must-try for fans of Girl Scout Cookies and mint chocolate delights. But here's where it gets controversial: is it a true Thin Mint experience? Share your thoughts in the comments, especially if you've tried this new sundae. Do you think it lives up to the hype, or is it just a clever marketing twist?

I Tried Costco’s New Double Chocolate Mint Sundae — Girl Scout Cookie Glow-Up! (2026)

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