Preheat your oven to 375°F (190°C) and spray a 2-quart casserole dish with non-stick cooking spray.

In a large skillet over medium heat, cook and crumble 1 pound of ground beef until no longer pink, about 6-8 minutes. Drain excess fat if needed, then add the taco seasoning mix and stir to combine.

Stir in the cubed cream cheese, Rotel tomatoes, and drained Ranch-style beans. Stir until the cream cheese is melted and all ingredients are well combined.

Spread the beef mixture evenly in the casserole dish. Add a layer of Frito corn chips over the beef, then sprinkle with the shredded Mexican blend cheese.

Place the casserole in the preheated oven and bake for 15 minutes, or until the cheese is melted and bubbly.

Remove the casserole from the oven and garnish with sliced jalapenos if desired. Serve with additional toppings such as shredded lettuce, chopped tomatoes, sour cream, green onions, and black olives.