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Bug or feature?

25 Jun 2026

On a self checkout screen in McDonalds, the screen shows 'May we suggest' with 3 options:
Big Mac Sauce 
Smarties M... image
I popped to McDonalds to get a McFluffy (ice cream) today (IYKYK living in south east England today!)
After selecting the Galaxy Mcfluffy, I was presented with a screen 'May we suggest' with 3 options:
  • Big Mac Sauce 
  • Smarties Mcfluffy
  • Oreo Mcfluffy

I wouldn't have thought anyone is ordering Big Mac Sauce so it shouted 'BUG' at me, but maybe it's an intentional feature :D

What do you think, and what do you think I selected next!

Ps sorry for the poor quality image but hopefully my description is good enough!
Deborah Reid profile image
Deborah Reid
Lead Test Engineer
she/her

As a Lead Test Engineer, with 15 years experience, Deborah specialises in quality engineering, risk management, and scaling test strategies.

Over the years, she has spearheaded quality operations for major international expansions, including multi-region deployments and scaled QE to support expanding product domains. Most recently, she's focused on driving shift-left quality practices and automation.

She is deeply passionate about fostering a quality-first culture that balances speed with stability. Her approach centres on pragmatic automation - leveraging tools like Cypress where they add maximum ROI, paired with targeted exploratory testing to safeguard complex user journeys.

She also has a passion for accessibility testing and has written a course on the topic https://www.ministryoftesting.com/courses/introduction-to-accessibility-testing?s_id=19046932

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Simon Tomes
Ha, brilliant! I initially thought bug then thought feature. A feature to encourage people to try something new or remind folks that other different items are available: "Ah, big mac sauce, maybe I also want a big mac?" kinda thing. Gonna assume you pressed the "Not Today" button at the bottom. Galaxy Mcflurry and Big Mac Sauce anyone? 🤢

Deborah Reid
Oh like an upsell! Interesting 100% I clicked not today :D though was tempted to get another mcfluffy as so warm!

Rosie Sherry
Waits for quality engineers to randomly pop into McDonald's to test it out.

Louise Woodhams
its limited time only sauce, get it while its HOT / not remotely related to your purchase.

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