My husband called this Chili Relleno Casserole “the best thing you’ve ever made” on a random Tuesday night. High praise from a man who once ranked my birria above his grandmother’s.
Jump to RecipeI’ve always loved chili rellenos at restaurants but honestly? Standing over a pot of hot oil with a toddler at my ankles is not my idea of a fun weeknight. So I started making chili relleno casserole instead, and I haven’t looked back. You get all those smoky, cheesy, egg-puffed flavors layered up in a baking dish, and the whole thing comes together without a single fry splatter.
What makes this chili relleno casserole different is the egg custard. Not just beaten eggs. A real mixture that puffs in the oven and hugs every layer of chile and cheese the way it should.
My teenager takes leftovers for lunch. My toddler eats around the peppers and happily destroys the cheesy egg part. Wins all around.
Why You’ll Love This Chili Relleno Casserole
- No frying required: same smoky, cheesy payoff without the oil splatter
- Ready in about an hour: easy enough for a weeknight, impressive enough for guests
- Uses simple pantry and fridge staples: nothing obscure, nothing hard to find
- Naturally gluten-free: the whole dish, no substitutions needed
- Leftovers reheat like a dream: maybe even better the next day
Ingredients for Chili Relleno Casserole
For the chili relleno casserole:
- 6 whole poblano peppers
- 2 cups Monterey Jack cheese, shredded, this is your primary melt, creamy and mild
- 1 cup sharp cheddar, shredded, adds that sharp salty punch in every bite
- 4 large eggs
- ¾ cup whole milk, whole milk makes the custard richer; 2% works if that’s what you have
- 1 can (4 oz) diced green chiles, for a little extra chile flavor between layers
- ½ teaspoon garlic powder
- ½ teaspoon ground cumin
- ½ teaspoon salt
- ¼ teaspoon black pepper
- 1 cup red enchilada sauce, jarred is totally fine; I use it straight from the can on weeknights
Optional toppings:
- Sour cream
- Fresh cilantro
- Sliced jalapeño
- Diced tomato
How to Make Chili Relleno Casserole, Step by Step
Step 1: Roast the poblanos
Set your oven broiler to high and place the whole poblano peppers directly on a foil-lined baking sheet. Broil for 8 to 10 minutes, turning them halfway through, until the skins are blackened and blistered on all sides. This char is everything, it’s what gives chili relleno casserole that deep, smoky backbone you can’t get any other way. Once they’re roasted, drop them into a zip-top bag or cover them with a bowl and let them steam for 10 minutes. That steam loosens the skin so it practically slips right off.
Step 2: Peel and prep the peppers
Pull the peppers out of the bag and gently rub or peel off the charred skin, it should come off easily. Don’t rinse them under water; that washes away flavor. Make a slit down one side of each pepper and carefully pull out the seed pod and any larger seed clusters. You want them mostly intact, almost like little pockets. They don’t have to be perfect. Rustic is the whole personality of this dish.
Step 3: Layer the casserole
Preheat your oven to 350°F. Lightly grease a 9 x 13 baking dish. Lay half of the peeled poblanos in a single layer across the bottom. Scatter half the Monterey Jack and half the cheddar over the peppers, then spoon the diced green chiles evenly across the cheese. Add the remaining peppers in another layer on top, then sprinkle on the rest of the cheese. This layering is what makes every forkful of chili relleno casserole an actual event, pepper, cheese, more pepper, more cheese.
Step 4: Make the egg custard
In a mixing bowl, whisk together the eggs, whole milk, garlic powder, cumin, salt, and pepper until the mixture is frothy and fully combined, about 60 solid seconds of whisking. That air you’re beating in is what makes chili relleno casserole puff up beautifully in the oven. Don’t just stir it; actually whisk it hard. This is a one-minute arm workout with a delicious payoff.
Step 5: Pour and prep for the oven
Pour the egg custard evenly over the entire layered casserole, making sure it seeps down between the peppers and coats everything. Give the dish a gentle shake to help the custard settle in. Then drizzle the red enchilada sauce over the top, this is what gives your chili relleno casserole that beautiful color and a little tangy depth on top while it bakes.
Step 6: Bake and rest
Slide the casserole into your preheated 350°F oven, uncovered, and bake for 35 to 40 minutes. You’re looking for the egg custard to be set in the center (not jiggly), puffed and golden on top, and the cheese bubbling at the edges. Pull it out and let it rest for at least 10 minutes before you cut into it. I know. It’s hard. But that rest lets the custard firm up so you get clean, beautiful slices instead of a puddle on the plate.
Amber’s Tips for the Best Chili Relleno Casserole
💛 Amber’s Tip: Don’t skip the resting time after baking, I know it’s tempting to cut right in, but 10 minutes makes the difference between a clean slice and a messy scoop. Also, if your poblanos are extra large, you might only need five. Stuff them generously; don’t try to stretch them thin across the pan or you’ll lose all that smoky pepper flavor in every bite.
Variations
Make It Spicier
Add one or two seeded and minced jalapeños between the layers when you add the diced green chiles. You can also swap the mild enchilada sauce for a chipotle red sauce, that smoky heat layers beautifully into the chili relleno casserole without overwhelming the peppers.
Make It with Meat
Brown half a pound of seasoned ground beef or chorizo and scatter it between the pepper layers before adding the cheese. It turns chili relleno casserole into a full one-dish dinner that my husband circles back for seconds on every single time.
Lighter Version
Swap whole milk for unsweetened almond milk or low-fat milk, and use a reduced-fat Monterey Jack. The custard won’t be quite as rich but it still sets beautifully and the smoky poblano flavor carries the whole dish.
Make It Ahead
Assemble the entire chili relleno casserole the night before, layers, custard, enchilada sauce on top, cover it with plastic wrap and refrigerate overnight. Pull it out 20 minutes before baking to take the chill off, then bake as directed. It’s a genuinely great make-ahead dinner.
What to Serve with Chili Relleno Casserole
Mexican rice: a simple tomato-based rice is the natural partner here. It soaks up any extra enchilada sauce on the plate beautifully.
Refried beans: creamy, rich refried beans alongside a slice of chili relleno casserole make this feel like a full restaurant-style plate.
A simple green salad: something crisp and acidic (lime vinaigrette, please) cuts through the richness of the egg and cheese perfectly.
Warm flour or corn tortillas: my kids scoop up everything with tortillas. Zero complaints from anyone at the table.
Storage and Reheating
Fridge: Store leftover chili relleno casserole in an airtight container or tightly covered baking dish for up to 4 days.
Freezer: Chili relleno casserole freezes well. Wrap individual portions tightly in plastic wrap and then foil, and freeze for up to 2 months. Thaw overnight in the fridge before reheating.
Reheating: The oven is your best friend here. Cover with foil and reheat at 325°F for about 15 minutes until warmed through. The microwave works in a pinch but the custard can get a little rubbery, just keep it at 60-second intervals.
Make-ahead: As mentioned in the variations, you can assemble the full casserole the night before and refrigerate unbaked. This is genuinely one of my favorite tricks for busy weeknights.
Frequently Asked Questions
Can I use Anaheim peppers instead of poblanos for chili relleno casserole?
Yes, absolutely. Anaheim peppers are milder and slightly thinner than poblanos, so you may need one or two extra to cover the pan. Roast and peel them the same way. The chili relleno casserole will be a little lighter in flavor but still totally delicious, great option if you’re cooking for spice-sensitive folks.
Do I have to peel the roasted peppers for chili relleno casserole?
You really should. The charred skin is bitter and papery once baked, and it makes the texture of the casserole unpleasant. It takes about five minutes once the peppers have steamed and the skin loosens. It’s one of those steps that feels annoying but absolutely matters for the final dish.
Why did my chili relleno casserole come out watery?
Two common reasons: the peppers weren’t patted dry before layering, or the casserole was cut too soon after baking. Let your roasted peppers rest on a paper towel briefly before layering, and always allow the full 10-minute rest after baking. Both steps help the casserole set up and hold its structure cleanly.
Can I make chili relleno casserole without eggs?
The egg custard is really the structural heart of the dish, so skipping it entirely changes the whole texture. That said, a flax egg or commercial egg replacer can work for a vegan version, the custard won’t puff quite as dramatically but it will still hold together. Use unsweetened oat milk in that case for the closest texture.
What kind of cheese is best for chili relleno casserole?
Monterey Jack is the classic choice, it melts smoothly and doesn’t overpower the pepper flavor. A Oaxacan cheese (quesillo) is even more traditional if you can find it and gives an incredible melt and mild milky flavor. Cheddar adds sharpness.
Tried This Recipe?
I really hope this chili relleno casserole earns a spot in your regular dinner rotation, it’s become one of the most-requested meals at our house and I’m so glad I finally put it on the blog. If you make it, please leave a star rating and drop a comment below, it genuinely makes my week and helps other moms find the recipe too.
Chili Relleno Casserole
Ingredients
Equipment
Method
- Set oven broiler to high. Place whole poblano peppers on a foil-lined baking sheet and broil for 8 to 10 minutes, turning halfway, until skins are blackened and blistered on all sides.
- Transfer roasted peppers to a zip-top bag or cover with a bowl and steam for 10 minutes. Peel off charred skin, make a slit down one side of each pepper, and remove the seed pod. Do not rinse peppers under water.
- Preheat oven to 350°F. Lightly grease a 9×13 baking dish. Lay half the peeled poblanos in a single layer on the bottom. Scatter half the Monterey Jack and half the cheddar over the peppers, then spoon the diced green chiles evenly on top. Add the remaining peppers in a second layer, then top with the remaining cheese.
- In a mixing bowl, whisk together eggs, whole milk, garlic powder, cumin, salt, and pepper for about 60 seconds until frothy and fully combined.
- Pour the egg custard evenly over the layered casserole. Give the dish a gentle shake to help it settle. Drizzle red enchilada sauce over the entire top.
- Bake uncovered at 350°F for 35 to 40 minutes, until the custard is set in the center, puffed and golden, and the cheese is bubbling at the edges.
- Remove from oven and rest for 10 minutes before slicing. Serve with sour cream, fresh cilantro, and desired toppings.
Nutrition
Notes
Tried this recipe?
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