Mrs. Backer’s Pastry Shop
319 East South Temple in Salt Lake City, Utah.

This shop opened in 1941 and has been a classic in Salt Lake ever since, the vintage neon signs really stand out.

This post by preservationutah says:
If longevity is any measure of the success of a business, then Mrs. Backers Pastry Shop must surely be one of the most successful businesses in Utah. The pastry shop’s story began in 1922 when Gerhard Backer moved his family to America from Germany. Upon arriving in Salt Lake City, Gerhard opened the West High Bakery, and for 15 years, the Backer family worked and lived in the bakery at 165 North 200 West.

Gerhard, according to Marty Backer, specialized in baking bread. But his son, Martin, sought to explore more creative products. So, in 1939, the 21-year-old returned to Germany to attend bakery school. While in Germany, Martin was offered a commission in the S.S. His refusal caused resentment among the Nazi military, and Martin became a fugitive in his home country. Like so many others, Martin had to escape Germany—and Europe—eventually returning to Salt Lake City. Upon his return, he proclaimed: “I’m mighty glad and proud to be an American citizen. Otherwise, I might be in a German trench or a Nazi concentration camp.”

Not long after his return, the Backers opened a “tea room” at 434 East South Temple. At the time, bakeries, per se, were prohibited in residential neighborhoods, and attempts by other bakeries to do so had even been met with protests by neighborhood residents. “City ordinances would not permit a bakery at that location,” remarked the Salt Lake Tribune, “but would allow a tea room or cafe, which are permitted to bake their own pastries. Mr. Backer promised the place would not engage in the baking of bread or any wholesale business.” If your math serves you well, that was over 70 years ago. And the Backer family has been selling all manner of baked delicacies from that location ever since, making it a fixture on South Temple, even as the street has changed dramatically.