Costco's Girl Scout Cookie-Inspired Sundae: A Delicious Review (2026)

Get ready for a sweet surprise! 🍦🍪🍫

I recently indulged in Costco's latest dessert sensation, and it's a game-changer. Imagine a sundae that takes your favorite Girl Scout Cookie and transforms it into a frozen delight. Yes, you heard right!

As a self-proclaimed Costco pizza enthusiast, I never imagined a dessert could sway me from my usual choice. But this new ice cream creation has me reconsidering my loyalty. The Double Chocolate Mint Sundae is a refreshing twist on a classic, launched just in time for St. Patrick's Day and the much-anticipated Girl Scout Cookie season.

Here's the scoop: this sundae features mint soft serve, a delightful departure from the usual chocolate option. You can opt for a mint and vanilla swirl if you prefer a milder mint experience. But the magic doesn't stop there. It's layered with chocolate sauce and topped with chocolate cookie crumbles, earning its 'double chocolate' title. At $2.99, it's a small price to pay for such a treat, especially compared to Costco's regular chocolate and strawberry sundaes.

But here's where it gets interesting: the mint soft serve is not just any mint. It has a distinct Thin Mint cookie vibe, making it a must-try for cookie enthusiasts. And the cookie crumbles? They're not your ordinary Oreos; they're a crunchy, chocolatey delight, reminiscent of Thin Mints without the coating. Costco doesn't hold back on the cookie love, ensuring a generous layer at the bottom and on top.

I, for one, craved a bit more chocolate sauce, especially towards the middle of the sundae. But it seems the amount varies with each serving, so your mileage may vary. The mint flavor is more reminiscent of a Shamrock Shake than a Thin Mint, but it's a welcome twist, especially considering the generous portion size. The sundae's sweetness is perfectly balanced, making it easy to devour without feeling overwhelmed.

If you miss out on Costco's limited-time offer, fear not! Other fast-food chains are also celebrating the season with minty treats. McDonald's Shamrock Shake, Wendy's Girl Scout Thin Mints Frostys, and Dairy Queen's Mint Chocolate Blizzard are all worthy alternatives.

Have you had the chance to try Costco's new sundae? What did you think? Is it a worthy contender in the world of mint chocolate desserts? Share your thoughts below, and let's spark a sweet debate!

Costco's Girl Scout Cookie-Inspired Sundae: A Delicious Review (2026)
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