Mix box of cake mix, cup of water, egg, and oil together in a large bowl.
Pour mixture into a frosting bag with a tip cut off or into a Ziploc bag with a cut off corner. Break up Mini Cow Tales into small pieces and add to the bag (leave some remaining).
Pipe into mini donut maker or a pan and bake according to the timer or until fully cooked.
After donuts are cooked, warm up donut glaze (Krispy Kreme used) for a few seconds in the microwave.
Remove donuts from our glaze over donuts and sprinkle remaining chopped up Mini Cow Tales on top of glaze.