Step 1: Preheat the Oven

Preheat your oven to 350°F (175°C). While the oven is heating, take a moment to grease a 9×13-inch baking dish.

Step 2: Cook the Ground Beef

In a large skillet, add 1 pound of ground beef and brown it over medium heat. Once it’s browned, add in the chopped onion and bell pepper. Continue cooking until the vegetables are softened, about 5 minutes. Mix in the taco seasoning and the drained diced tomatoes with green chilies. Cook for an additional 3-5 minutes, stirring occasionally.

Step 3: Prepare the Biscuit Base

Open the can of refrigerated biscuits and spread the dough evenly across the bottom of the greased baking dish. Pre-bake the biscuits in the oven for 5 minutes until they are slightly puffy.

Step 4: Assemble the Casserole

Once the biscuit base is ready, layer the cooked beef mixture over the partially baked biscuit crust, spreading it out evenly.

Step 5: Mix the Creamy Topping

In a separate bowl, combine 1 cup of sour cream, 1 cup of mayonnaise, and 1 packet of ranch dressing mix. Stir well until smooth. Spread this creamy mixture evenly over the beef layer.

Step 6: Add Cheese and Jalapeños

Sprinkle 1 cup of shredded cheddar cheese and 1 cup of shredded Monterey Jack cheese on top of the creamy layer. If you enjoy a little spice, add sliced jalapeños from the 4-ounce can as an optional topping.

Step 7: Bake the Casserole

Place the assembled casserole in the preheated oven and bake for 25-30 minutes or until the cheese is melted and bubbly. Once it’s done, allow it to cool slightly before serving.