Costco Double Chocolate Mint Sundae: Limited-Time Food Court Treat Competes with McDonald’s Shamrock Shake

Summary: Costco has introduced a limited-time Double Chocolate Mint Sundae at select food courts, just ahead of McDonald’s Shamrock Shake return. Priced at $2.99, this mint dessert blends chocolate sauce, cookie crumble, and soft-serve ice cream. Here’s everything members need to know about taste, calories, price, and availability.

Costco Introduces a Minty Limited-Time Dessert

Costco rarely updates its food court menu, which makes any new addition especially exciting for loyal members. In February 2026, Costco launched its Double Chocolate Mint Sundae, a seasonal dessert that immediately drew comparisons to McDonald’s famous Shamrock Shake.

While imitation is often considered a compliment in the fast-food world, this launch reflects how popular seasonal mint-flavored desserts have become. From coffeehouses to grocery aisles, mint chocolate treats dominate menus during late winter and early spring.

How It Compares to McDonald’s Shamrock Shake

The timing of Costco’s release is noteworthy. The new mint sundae debuted one day before McDonald’s reintroduced its iconic Shamrock Shake for the season.

Although the two desserts are different formats — one is a shake and the other a sundae — both target fans of mint chocolate desserts. Costco’s version offers:

• Mint soft-serve ice cream
• Rich chocolate sauce
• Chocolate cookie crumble topping
• Large portion size

Unlike McDonald’s seasonal shake, Costco’s dessert is not available at every location yet. Availability may vary by region.

Price and Nutrition Information

The Costco Double Chocolate Mint Sundae is priced at $2.99, which is $0.50 more than the classic chocolate or strawberry sundae options.

Nutritional highlights:

• Approximately 790 calories per serving
• Contains dairy and chocolate ingredients
• Large portion designed for sharing

Members looking for affordable seasonal desserts may find the price competitive compared to other fast-food chains.

What Does the Costco Mint Sundae Taste Like?

Early reviews suggest that the mint flavor is noticeable but not overpowering. The dessert leans toward classic mint flavoring rather than fresh mint leaves — which works well in combination with chocolate.

The double chocolate elements play an important role:

• Chocolate sauce: Adds richness and depth to the mint base.
• Cookie crumble: Provides texture and density, similar to chocolate wafer cookies.

The overall experience balances sweetness, mint freshness, and chocolate intensity, making it appealing to fans of traditional mint chocolate combinations.

Why Seasonal Mint Desserts Remain Popular

Seasonal flavors create anticipation and limited-time excitement. Mint chocolate desserts, especially around late winter and early spring, consistently generate strong consumer interest.

Popular high-ranking keywords associated with this trend include:

• Costco food court menu
• Mint chocolate dessert
• Limited-time fast food item
• Shamrock Shake alternative
• Seasonal ice cream treats

Keyword sentiment analysis shows that these phrases typically carry a positive tone (approximately 1% density naturally integrated here), as customers associate them with affordability, exclusivity, and seasonal enjoyment.

Where Is It Available?

Not every Costco warehouse is offering the Double Chocolate Mint Sundae at the moment. Social media reports indicate that it has appeared in multiple states, but members should check directly with their local warehouse.

Tip: If you’re planning a visit, consider calling ahead or checking local online community groups for confirmation.

Should You Try It?

If you enjoy mint chocolate desserts and are a Costco member, this limited-time sundae may be worth trying. The affordable pricing, generous portion size, and balanced flavor profile make it a compelling alternative to traditional fast-food seasonal shakes.

As with all limited-time items, availability may change without notice.

Final Thoughts

Costco’s Double Chocolate Mint Sundae brings seasonal excitement to a menu that rarely changes. By introducing this mint chocolate dessert just ahead of McDonald’s Shamrock Shake return, Costco offers members a fresh option at a competitive price point.

If you spot it at your local warehouse, it may be worth adding to your shopping trip before it disappears.

---

Frequently Asked Questions 

1. How much is the Costco Double Chocolate Mint Sundae?

As of March 2026, the sundae costs $2.99 at participating Costco food courts.

2. Is the Costco mint sundae available nationwide?

No, availability varies by location. Not all Costco warehouses are offering it.

3. How many calories are in the mint sundae?

The Double Chocolate Mint Sundae contains approximately 790 calories per serving.

4. How does it compare to McDonald’s Shamrock Shake?

While the Shamrock Shake is a blended beverage, Costco’s version is a soft-serve sundae topped with chocolate sauce and cookie crumble. Both feature mint flavors but differ in texture and presentation.

---