1Preheat the oven to 350 degrees F (175 degrees C).
2Spray a 9x13-inch casserole dish with cooking spray.
3Cook and stir ground beef in a Dutch oven over medium-high heat until meat starts to brown and release juices, about 5 minutes.
4Reduce heat to medium and stir in poblano peppers, salt, salsa, oregano, and chipotle powder; cook and stir until seasoned beef is crumbly and no longer pink, about 10 minutes.
5Mix one package of corn muffin mix in a large bowl with 1 egg and 1/3 cup of milk. Whisk to combine. In a separate large bowl, mix the second package of corn muffin mix with 1 egg, 1/3 cup of milk and half the Cheddar and Monterey Jack cheeses.
6Spread the prepared corn muffin mixture without cheese into the prepared baking dish. Sprinkle corn over the muffin mix, followed by remaining half of the cheeses, then the beef mixture.
7Spoon the corn muffin mix with cheese on top of the beef and carefully spread over the top with a fork, leaving about half an inch from the edges of the pan.
8Bake in the preheated oven for 50-60 minutes, until golden brown.
You can substitute red or green bell peppers for the poblano peppers if needed.
This recipe freezes well, whether baked or unbaked. If you freeze it unbaked, bake it, covered in foil, for an extra 30-40 minutes until cornbread is golden and casserole is heated through.
Aluminum foil helps keep food moist, ensures it cooks evenly, keeps leftovers fresh, and makes clean-up easy.