They are made with Betty Crocker’s Yellow Cake Mix plus cornmeal.
The recipe can be found here at bettycrocker.com.
Please also check out all the other recipes using the new mixes. There is a section specifically for the gluten-free mixes, but you could also adapt many of the other recipes which use the normal ones. Just remember that the gluten-free mixes are about half the size as the normal ones, and adjust as necessary.