It's wasn't Betty Crocker.<p>The powdered egg effect for cake mixes is from the Duff and Sons, 1930s - <a href="https://www.bonappetit.com/entertaining-style/pop-culture/article/cake-mix-history" rel="nofollow">https://www.bonappetit.com/entertaining-style/pop-culture/ar...</a> .<p>You can read their 1933 patent application (Patent #: US002016320) at <a href="https://pdfpiw.uspto.gov/.piw?docid=02016320&SectionNum=3&IDKey=146830A129B5&HomeUrl=http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1%2526Sect2=HITOFF%2526d=PALL%2526p=1%2526u=%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r=1%2526f=G%2526l=50%2526s1=2016320.PN.%2526OS=PN/2016320%2526RS=PN/2016320" rel="nofollow">https://pdfpiw.uspto.gov/.piw?docid=02016320&SectionNum=3&ID...</a> .<p>Column 1, starting at line 22.<p><a href="https://www.bbc.com/future/article/20171027-the-magic-cakes-that-come-from-a-packet" rel="nofollow">https://www.bbc.com/future/article/20171027-the-magic-cakes-...</a> gives more context to the story, giving it a different slant:<p>> But the eggs may only have been part of cake mix's success. “I think it was frosting,” she says. When premade frosting and elaborate decorations came in, turning focus away from the substance of the cake, and onto its exterior, that may have really given the idea legs. We all want to have a way to demonstrate our love, and frosting – as a way turn a simple cake into a castle, a football field, a church – brought that. “And that, I think, is what changed the fate of cake mixes,” she says.