The dangers of breastmilk brownies and black magic cake

Brownies are one of the most delectable of treats. Alas, chocolate brownies are now a bygone pleasure for me, because they trigger migraines.
Recently they got a medical colleague of mine in trouble, too, after a very bizarre chain of events. His story certainly had me chuckling.
My colleague works as a paediatrician overseas. He had told his 16-year-old son about his early career, working long shifts in hospital. Yet in those days there was kindness extended to the overworked doctors. The nurses baked brownies for the first-year residents.
They were the best brownies he had ever eaten.