Softasilk Cake Flour packaging, copyright ca. 1938. General Mills cake mixes used Softasilk Cake Flour. The flour addition caused their 1947 mix to be named “Ginger Cake,” not “Gingerbread.”
Advertisement for Soilax, a product of Economics Laboratory, printed in Woman's Day 16, no. 6 (March 1953). Photograph by Flickr user Classic Film on December 5, 2013.