Preheat oven to 350°F. Grease a 2-quart baking dish (about 9-inch square or 11 x 7-inches) or spray with nonstick cooking spray. Set side.
In a large skillet over medium-high heat, brown the ground meat with the taco seasoning mix and water according to the package directions. Spread the taco meat in the bottom of the prepared baking dish. Top with cheese.
In a large bowl, stir together the corn kernels, cream-style corn, green chiles, jalapeno, sour cream, eggs, Jiffy mix, and melted butter.
Spread the cornbread mixture over the taco meat.
Bake, uncovered, for 50-55 minutes, or until lightly browned on top. The casserole is done when the center is set and a toothpick inserted in the center comes out clean or with loose crumbs, but not wet with batter. If the top of the casserole starts to get too dark before it’s cooked through, just tent loosely with foil and continue baking.