![\"Costco\u2019s](\"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/02\/costcodblchomsd1.jpeg?resize=600%2C750&ssl=1\")
<\/p>\n<\/p>\n
This year\u2019s McDonald\u2019s Shamrock Season is here! <\/p>\n
But if you have a Costco membership card, I might recommend grabbing it and heading to your nearest warehouse to get your hands on the new Double Chocolate Mint Sundae instead. Of course, that\u2019s after you pick up paper towels, frozen chicken, a pillow-sized bag of chips, rotisserie chicken, a bag of romaine hearts that\u2019ll rot before you get halfway through them, batteries, and a bunch of other things that\u2019ll easily total over $200.<\/p>\n
The seasonal dessert at the Costco food court features mint-flavored soft serve swirled with chocolate sauce and topped with more chocolate sauce and cookie crumbles.<\/p>\n
Much like everything at Costco, this sundae is more than you need and offers an amazing price. It\u2019s large enough and inexpensive enough to make the Oreo Shamrock McFlurry look McFeeble and green with size envy. Speaking of color, I\u2019m trying to remember whether Costco\u2019s dessert had a green tint. I keep squinting at the photos above and swearing I see some green, but I could\u2019ve sworn the creamy base was just white while I was eating it. Maybe the food court\u2019s LED lighting was doing something strange to my phone\u2019s camera. However, in the end, it doesn\u2019t really matter, because once you mix things, the chocolate syrup blends into the soft serve, turning everything grey. Delicious grey.<\/p>\n
![\"Costco\u2019s](\"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/02\/costcodblchomsd2.jpeg?resize=600%2C600&ssl=1\")
<\/p>\n
The mint in this sundae rises to a level of slightly chewed Wrigley\u2019s Doublemint Gum, and the chocolate, even though my sundae looks like it got caught in a chocolate flash flood, still allows the mint to come through. However, if you want a stronger minty punch, I feel McDonald\u2019s Oreo Shamrock McFlurry has Costco\u2019s offering beat, but only slightly. Also, because it\u2019s smaller, the McFlurry has a better soft-serve-to-cookie ratio. By the time I got to the bottom half of the sundae\u2019s cup, the cookie crumbles made rare appearances. <\/p>\n
However, while Costco\u2019s Double Chocolate Mint Sundae may not be as minty or have as many cookie bits as McDonald\u2019s offering, it still tastes amazing, and I say the chocolate syrup makes it more decadent. Also, its low $2.99 price for something twice the size of a McFlurry makes it taste a bit sweeter. I hope it returns every year so we can celebrate Costco Double Chocolate Mint Sundae Season!<\/p>\n
Purchased Price:<\/strong> $2.99 This year\u2019s McDonald\u2019s Shamrock Season is here! But if you have a Costco membership card, I might recommend grabbing it and heading to your nearest warehouse to get your hands on the new Double Chocolate Mint Sundae instead. Of course, that\u2019s after you pick up paper towels, frozen chicken, a pillow-sized bag of chips, rotisserie […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1440],"tags":[1477,1468,2306],"class_list":["post-75877","post","type-post","status-publish","format-standard","hentry","category-reviews","tag-fast-food","tag-ice-cream","tag-kirkland-signature"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":76690,"url":"https:\/\/www.theimpulsivebuy.com\/wordpress\/2026\/04\/10\/kirkland-signature-caramel-churro-sundae-review\/","url_meta":{"origin":75877,"position":0},"title":"REVIEW: Kirkland Signature Caramel Churro Sundae","author":"Marvo","date":"April 10, 2026","format":false,"excerpt":"Costco\u2019s Food Court menu is pretty consistent. Yes, from time to time, a new item is added to the menu, but anything rarely sticks. Remember the cheeseburger? Remember the roast beef sandwich? Heck, because I need a good cry, I\u2019m also going to mention the beloved and long-discontinued Polish Dog\u2026","rel":"","context":"In "Reviews"","block_context":{"text":"Reviews","link":"https:\/\/www.theimpulsivebuy.com\/wordpress\/category\/reviews\/"},"img":{"alt_text":"Kirkland Signature Caramel Churro Sundae and its caramel swirls.","src":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/04\/kscarchusd1-600x750.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/04\/kscarchusd1-600x750.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/04\/kscarchusd1-600x750.jpeg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":73497,"url":"https:\/\/www.theimpulsivebuy.com\/wordpress\/2025\/10\/31\/4-other-things-i-consumed-this-week-10-31-2025\/","url_meta":{"origin":75877,"position":1},"title":"4 Other Things I Consumed This Week: 10\/31\/2025","author":"Marvo","date":"October 31, 2025","format":false,"excerpt":"Spylt Caffeinated Chocolate Milk Several folks recently sent me Spotted photos of this Spylt caffeinated milk that comes in several flavors, but it's been around for a couple of years, so I didn't post them. It seems only now has it seen a wider rollout. I'm pretty sure somewhere in\u2026","rel":"","context":"In "Other Things I Consumed"","block_context":{"text":"Other Things I Consumed","link":"https:\/\/www.theimpulsivebuy.com\/wordpress\/category\/reviews\/other-things-i-consumed\/"},"img":{"alt_text":"Spylt Caffeinated Chocolate Milk","src":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2025\/10\/spyltchomlk-600x450.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2025\/10\/spyltchomlk-600x450.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2025\/10\/spyltchomlk-600x450.jpeg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":76434,"url":"https:\/\/www.theimpulsivebuy.com\/wordpress\/2026\/03\/24\/new-sweet-snacks-spotted-march-24-2026\/","url_meta":{"origin":75877,"position":2},"title":"New Sweet Snacks Spotted \u2014 March 24, 2026","author":"Marvo","date":"March 24, 2026","format":false,"excerpt":"Here are some interesting new products found on store shelves by your fellow readers. If you've tried any of them, share your thoughts in the comments. Spotted something new? Send your photos to theimpulsivebuy@gmail.com. 365 Whole Foods Market Jammin\u2019 Peanut Crunch Trail Mix 365 Whole Foods Market Confetti Puffs Cereal\u2026","rel":"","context":"In "Spotted on Shelves"","block_context":{"text":"Spotted on Shelves","link":"https:\/\/www.theimpulsivebuy.com\/wordpress\/category\/spotted-on-shelves\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/03\/barismtwhtchodipras.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/03\/barismtwhtchodipras.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/03\/barismtwhtchodipras.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/03\/barismtwhtchodipras.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2026\/03\/barismtwhtchodipras.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":42530,"url":"https:\/\/www.theimpulsivebuy.com\/wordpress\/2020\/02\/19\/spotted-non-dairy-frozen-dessert-edition-2-19-2020\/","url_meta":{"origin":75877,"position":3},"title":"SPOTTED (NON-DAIRY FROZEN DESSERT EDITION) – 2\/19\/2020","author":"Marvo","date":"February 19, 2020","format":false,"excerpt":"Here are some new non-dairy frozen dessert products found on store shelves by your fellow readers. If you've tried any of them, share your thoughts in the comments. (Spotted by Rachel C at Sprouts.) (Spotted by Amanda Y at Sprouts.) (Spotted by Amanda Y at Sprouts.) (Spotted by Amanda Y\u2026","rel":"","context":"In "Spotted on Shelves"","block_context":{"text":"Spotted on Shelves","link":"https:\/\/www.theimpulsivebuy.com\/wordpress\/category\/spotted-on-shelves\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2020\/02\/Sprouts-Chocolate-Coconut-Milk-Non-Dairy-Dessert-Chocolate-and-Mint-Chocolate-Chip.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2020\/02\/Sprouts-Chocolate-Coconut-Milk-Non-Dairy-Dessert-Chocolate-and-Mint-Chocolate-Chip.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2020\/02\/Sprouts-Chocolate-Coconut-Milk-Non-Dairy-Dessert-Chocolate-and-Mint-Chocolate-Chip.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2020\/02\/Sprouts-Chocolate-Coconut-Milk-Non-Dairy-Dessert-Chocolate-and-Mint-Chocolate-Chip.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2020\/02\/Sprouts-Chocolate-Coconut-Milk-Non-Dairy-Dessert-Chocolate-and-Mint-Chocolate-Chip.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":36440,"url":"https:\/\/www.theimpulsivebuy.com\/wordpress\/2019\/05\/07\/wendys-frosty-cookie-sundae-review\/","url_meta":{"origin":75877,"position":4},"title":"REVIEW: Wendy’s Frosty Cookie Sundae","author":"Adam","date":"May 7, 2019","format":false,"excerpt":"What is Wendy\u2019s Frosty Cookie Sundae? Back in the day (Read: The first two or three years of the decade) Wendy's toyed with numerous Frosty variations, including waffle cones, shakes, and parfaits. But, after the past few years of relegating the Frosty to a value menu afterthought and French fry\u2026","rel":"","context":"In "Reviews"","block_context":{"text":"Reviews","link":"https:\/\/www.theimpulsivebuy.com\/wordpress\/category\/reviews\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2019\/05\/Wendys-Frosty-Cookie-Sundae-Cookie-Closeup.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2019\/05\/Wendys-Frosty-Cookie-Sundae-Cookie-Closeup.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2019\/05\/Wendys-Frosty-Cookie-Sundae-Cookie-Closeup.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2019\/05\/Wendys-Frosty-Cookie-Sundae-Cookie-Closeup.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2019\/05\/Wendys-Frosty-Cookie-Sundae-Cookie-Closeup.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":31751,"url":"https:\/\/www.theimpulsivebuy.com\/wordpress\/2018\/09\/27\/spotted-on-shelves-snack-factory-dark-chocolate-mint-crunch-pretzel-crisps\/","url_meta":{"origin":75877,"position":5},"title":"SPOTTED ON SHELVES: Snack Factory Dark Chocolate Mint Crunch Pretzel Crisps","author":"Marvo","date":"September 27, 2018","format":false,"excerpt":"(Spotted by Robbie at Costco.) Thank you to all the photo contributors! If you\u2019re out shopping and see an interesting new product on the shelf, snap a picture of it, and send us an email (theimpulsivebuy@gmail.com) with where you found it and \"Spotted\" in the subject line. Or reply to\u2026","rel":"","context":"In "Spotted on Shelves"","block_context":{"text":"Spotted on Shelves","link":"https:\/\/www.theimpulsivebuy.com\/wordpress\/category\/spotted-on-shelves\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.theimpulsivebuy.com\/wordpress\/wp-content\/uploads\/2018\/09\/Snack-Factory-Dark-Chocolate-Mint-Crunch-Pretzel-Crisps.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/posts\/75877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/comments?post=75877"}],"version-history":[{"count":0,"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/posts\/75877\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/media?parent=75877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/categories?post=75877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.theimpulsivebuy.com\/wordpress\/wp-json\/wp\/v2\/tags?post=75877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nRating:<\/strong> 8 out of 10
\nNutrition Facts:<\/strong> 790 calories. (No other nutritional information is available)<\/p>\n","protected":false},"excerpt":{"rendered":"