Did they have canola oil in 1975?
One thing that we have noticed about carrot cake is that fresh-dug garden carrots are WAY better in the cake.
LOL! In 1975, the recipe probably just said ‘vegetable oil’. I probably used something like Wesson Oil, or Corn Oil - I can’t remember, because ‘oils’ were not used in my household, until I ‘came of age’ and started cooking!
But the last time I made the recipe, and wrote it down for a friend, I used Canola as the best choice.
-JT