In 1977 or so we went to visit our friends, Joyce and Ron, who lived in Haines, Oregon. Joyce served us Texas Sheet Cake and Ray liked it so much, he sat right down and copied the recipe. Over the years, we've changed the recipe just a bit and came up with the Tex-Mex version. Once when our son was just a little guy I made the 'original' version for his birthday and decorated the top with about 20 little dinosaur figures from the dollar store. It was a big hit, and this cake (with or without disosaurs) has been the requested cake for many family birthdays since.