In a medium sized bowl add the Jiffy, egg, and milk. Whisk to combine then set aside.
To a skillet on the stove add the ground beef and cook through. Once cooked remove any access grease then add in the taco seasoning and water stir to combine. Now add in the drained can of corn, and rotel stir everything together rand let simmer for 5 minutes.
Grease a 2.5 QT baking dish then add the ground beef mixture in then carefully pour the jiffy cornbread mixture over, spread out as even as possible. Bake for 25-30 minutes or until the cornbread is set. Enjoy with your favorite taco toppings.