"Bronx crepes suzette” is a jocular name for “blintzes.” Blintzes were popular with Jewish families in the Bronx—and many Jewish families lived in the Bronx in the 1930s and 1940s.
“Has anyone called blintzes ‘Bronx Crepes Suzettes’?” was cited in Walter Winchell‘s syndicated newspaper column in 1938. The term was cited once in 1950 as “counterman slang,” but is of historical interest today.
Wikipedia: Crêpe Suzette
Crêpe Suzette (pronounced: [kʁɛp syˈzɛt]) is a French dessert consisting of a crêpe with beurre Suzette, (pronounced: [bœʁ syzɛt]), a sauce of caramelized sugar and butter, tangerine or orange juice, zest, and Grand Marnier or orange Curaçao liqueur on top, served flambé.
A blin (pl. blini) or blintchik (pl. blintchiki) is a type of thin pancakes which typically lacks a leavening agent.; blin and blintchick are Russian names for crêpes.
Blintzes are one of the types of blini. Blintze is a thin usually wheat-flour pancake folded to form a casing (as for cheese or fruit) and then sautéed or baked.
5 April 1938, Morning World-Herald (Omaha, NE), “Walter Winchell On Broadway,” pg. 22, col. 2:
Has anyone called blintzes “Bronx Crepes Suzettes”?
Google News Archive
10 August 1950, Daytona Beach (FL) Morning Journal, “Broadway” by Jack Lait, pg. 6, col. 4:
More counterman slang:
“Bronx crepes suzette”—Blintzes.