It’s unclear when Betty Crocker added to the boxed cake flavors that are probably gone forever by discontinuing the Peanut Delight Cake Mix, but whatever year it was, it was way too soon. Even to 21st century eyes, ears, and tastebuds, it seems amazing: Advertisements for the mix boast that it used real peanut butter, as if we somehow needed more of a reason to pick up a box or 12. That frosting! That peanut butter flavor! If there’s anything that we’d like to see make a comeback from the 1950s, it’s this. Interestingly, the vintage advertisement for this cake mix contains a statement that helped give rise to a myth we’re now going to debunk … with a little help.

The statement is, “Homemade-fresh because you add fresh eggs,” and there’s a good chance you’ve heard the story that the sale of boxed cake mixes skyrocketed after they switched from including dried, powdered eggs to requiring real eggs. The idea was that home bakers felt like they were taking too much of a shortcut. But according to “Something From The Oven: Reinventing Dinner In 1950s America” author Laura Shapiro (via Snopes), the switch and the increased popularity of boxed mixes likely had more to do with the fact that fresh eggs made better cakes and that those cakes were marketed as a convenient step toward a final, glorious masterpiece. And that peanut butter cake surely was precisely that.