My mom was an excellent, efficient and thrifty baker/homemaker so when we were kids, "store bought" treats were exceedingly rare. Because of their convenience though, we would sometimes find them packed in our lunches for special occasions like field trips, vacations, etc.
I haven't had one in years, but when I would occasionally pick one up at a convenience store on a long road trip, or from a vending machine when my work hours precluded lunch or dinner, they served as powerful triggers of youthful memories.
“...powerful triggers of youthful memories.”
Comfort Foods.