It can also mean something "wondrous" is about to happen. That certainly matches both the browning of mayonnaise AND the amazing conclusion of a magic show. Let's be honest, if you break everything down to its physical reality, no actual "magic" happens in a magic show either.

It would seem you prove my original point -- people today equate "wondrous" and even "magical" with "magic" as a demonstration of the impossible that has not rational explanation.

The term has been so conflated and watered down that a typical spectator doesn't know what to expect when you offer to perform a magic effect.

And I totally disagree with the last part. Definitional, of course, but magic happens all the time as a result of our defying the impossible in a theatrical way.
I have helped hundreds of business owner overcome problem in their business (considered impossible) by including magic tricks in my presentations.

Others have provided similar stories -- lives changed in positive ways because of performance magic.

Check with the Vanishing Wheel Chair Project. Persons with disabilities developing entirely new skills and life attitude because of magic.

The results are "physical" and the parents readily say "magic happened." They don't say that about burned bread.

I can live with people calling a cleaning product 'amazing" and even "magical." My objection is their saying "here the magic happens" - big difference for me.

If I accepted your statement then the ad is a lie -- since magic never happens, why do they claim it? But, people do think magic can happen - so it is real. Just not in this ad.