Chile Rellenos Casserole brings together soft green chiles, melted Jack and cheddar, and a simple egg-and-milk batter in one baking dish. The top turns golden while the middle stays tender and cheesy. Canned whole chiles keep the preparation easy, with no roasting or frying needed.
This version makes six servings in a 9×9-inch dish. It is a good choice for a meatless dinner with rice and salsa, or a warm brunch dish with something fresh alongside. The texture is closer to a soft, cheesy egg bake than a crisp, battered pepper.
The complete quantities and method are in the recipe card below. A few details make the biggest difference: well-drained chiles, smooth batter, and enough time for the center to set before serving.
An Easy Bake for Dinner or Brunch
The appeal of this casserole is how little active cooking it needs. The chiles are already tender, the cheeses melt together in the oven, and the batter settles into the spaces between the layers. Most of the work is draining, grating, and whisking. Plan on a short rest after baking, especially if you want portions that hold together on the plate.
Choosing the Chiles and Cheese
Whole green chiles: Look for canned whole chiles rather than diced ones. Opening them flat gives you broad pieces that cover the dish and form distinct layers. Mild chiles are a useful starting point, but check the label because heat varies. Drain away the packing liquid, then gently blot the chiles if they still look wet. They should be soft, not dripping.
Jack and cheddar: Monterey Jack supplies the mild, creamy melt; cheddar gives the top more color and a stronger cheese flavor. Grating blocks yourself makes it easier to spread an even layer. If you use packaged shredded cheese, loosen any clumps before scattering it over the chiles.
The batter: Milk, eggs, and flour help bind the casserole without making it heavy. Whisk until the flour disappears into the liquid, checking the bottom of the bowl for dry pockets. The mixture should be pourable rather than thick like cake batter. Keep the salt and pepper in the batter so they are distributed throughout.
Getting a Tender, Set Center
- Use the specified dish. A 9×9-inch pan keeps the layers at the intended depth. A larger pan spreads them thinner and can bake faster.
- Spread the cheese evenly. Avoid a thick mound in the middle, which can hide a loose center under a browned top.
- Check the middle. Begin checking at 30 minutes. The center should be set, with no pool of liquid batter. If needed, continue baking and check again.
- Give it a rest. Let the dish stand for 5 to 10 minutes before serving. It will still be warm, but the filling will have time to firm up.
A golden top is only one clue. Check the center with a food thermometer as well; FoodSafety.gov recommends 165°F for casseroles. If the cheese is browning before the center is ready, loosely cover the top with foil while it finishes baking. Expect a tender interior rather than a dry, firm block.
What to Serve Alongside
Keep the sides simple because the casserole already has plenty of cheese. Rice, a crisp salad, or sliced avocado make a comfortable dinner. Salsa adds a bright contrast, and serving it separately lets everyone choose how much to add. For brunch, try fresh fruit or breakfast potatoes.
A modest portion goes a long way with a side dish. Serve it warm after resting, and leave any extra salsa on the table rather than pouring it across the entire pan. That keeps the top from becoming damp and makes leftovers easier to store.
Chile Rellenos Casserole
Ingredients
- 14 oz whole green chiles canned, drained and opened flat
- 3/4 lb Jack cheese grated
- 1 cup cheddar cheese grated
- 2 eggs
- 1/2 cup all-purpose flour
- 1 1/2 cups milk
- 1 tsp salt
- 1/2 tsp black pepper
Instructions
- Preheat the oven to 350°F and coat a 9×9-inch baking dish with nonstick cooking spray.
- Open the whole green chiles flat, remove any remaining seeds if desired, and drain them well. Gently blot away excess moisture. Arrange half of the chiles across the bottom of the prepared dish.
- Sprinkle half of the Jack and cheddar cheeses over the chiles. Add the remaining chiles in a second layer, then top with the remaining cheese.
- Whisk the eggs, flour, milk, salt, and black pepper until smooth, with no dry flour pockets. Pour the thin mixture evenly over the layered chiles and cheese.
- Bake uncovered for about 30 to 35 minutes, until the center is set and the top is lightly golden. Begin checking at 30 minutes; a food thermometer inserted into the center should read 165°F. Continue baking if needed. If the top browns before the center is ready, cover loosely with foil.
- Let the casserole rest for 5 to 10 minutes before slicing into 6 portions and serving.
Notes
Common Questions
Can I prepare it ahead?
For the easiest preparation, drain the chiles and grate the cheese in advance, then refrigerate them separately. Assemble and whisk the batter when you are ready to bake. This keeps excess moisture from collecting in the dish and avoids needing to estimate extra baking time for a cold assembled casserole.
Why is the casserole watery?
Usually, the chiles retained too much liquid or the center needed more time in the oven. Drain and blot the chiles, check the center rather than just the browned edges, and allow the short rest. A little melted cheese moisture is different from a pool of uncooked batter.
Can I use diced chiles?
Whole chiles are the best match for this layered recipe. Diced chiles disperse through the filling instead of forming sheets, so they give a different texture. Choose whole canned chiles when you want the casserole shown here.
More Easy Baked Dinners
For another comforting casserole, try Chicken Noodle Casserole. If you prefer a biscuit topping, Chicken Pot Pie Bake with Biscuits is another easy dinner to keep in your rotation.