The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with dutch-treat
An outing or date in which each person pays his or her own expenses. For example, Her parents agreed that she might date if it were a Dutch treat. The related expression
go Dutch means “to go on a date with each person paying their own way,” as in Students often elect to go Dutch. The first term dates from about 1870, and the variant from the early 1900s.