This simple recipe for Chile Relleno Breakfast Casserole with savory chiles, eggs, and cheese is always on the menu when our family gets together. It is going to be your new brunch MVP. It’s everything you love about traditional Chile Rellenos— chiles, melty cheese, a soft eggy interior—but baked into one big, bubbly breakfast casserole that practically makes itself.
This version is my favorite kind of morning recipe: the kind you can whisk together in a single bowl, pour into a dish, and bake without fuss. No frying. No stuffing peppers. No precarious egg whites. Just simple ingredients mixed together into something that feels special enough for holidays but easy enough for Tuesday.
I grew up with very little extended family but when I married Jonathan I ended up with an amazing, huge family who ALL love to cook! Clearly I was made for them and they were made for me. The Aunties are particularly special to me. They treated me like a beloved niece from day #1 and cooking with them is one of my favorite things to do!
Auntie Nancy introduced us to this delicious egg bake years ago and we have been making it ever since. Somebody always asks for the recipe whenever I bring it to church or a brunch.
What you’ll love about it:
- Super cheesy and flavorful — give me ALL the cheese!
- Tasty chile warmth without overwhelming heat
- Crowd-friendly and great for brunch or potlucks
- Naturally vegetarian and super easy to adapt for gluten free or low-carb diets
- One bowl, no chopping and zero drama
The ingredients list is short and practical: eggs, flour (or a flour sub), baking powder, shredded cheese, cottage cheese, butter, salt and of course cans of diced green chiles! Stirred together (with love of course) and baked, it gives you the cozy chile relleno vibe in a simple breakfast casserole format that just works.
What Is a Chile Relleno Breakfast Casserole?
A traditional chile relleno is all about roasted peppers stuffed with cheese, dipped in a fluffy egg batter, and fried until puffy and golden. Delicious? Yes. Weekday-morning-friendly? Not even a little.
This Chile Relleno Breakfast Casserole captures all the best flavors but simplifies the entire process into a stir-and-dump, baked breakfast casserole. Instead of stuffing individual chiles, you toss everything in a bowl with lots of cheese and stir. As it bakes, the casserole puffs just enough to feel reminiscent of a classic chile relleno, but with a creamy baked-egg texture that sets beautifully.
The flavor profile is warm, savory, and comforting:
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Chiles a mild kick and of course you can use fire roasted ones for a hint of smokiness
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Melty cheese adds richness and classic chile relleno vibes
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Eggs + cream give a silky, custardy breakfast casserole finish
It’s the best of both worlds: all the charm of chile rellenos with the ease of a make-ahead breakfast bake.
My Favorite Cheese Options for Chile Relleno Breakfast Casserole
Cheese is a star of this casserole, so pick one that melts beautifully.
- Mexican Blend – This is my go too because it is easy. Kirkland makes a great quality blend that is cost effective. That is usually my go to.
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Monterey Jack — The classic choice: creamy, melty, mild.
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Cheddar — Adds richness and a little sharper flavor. I prefer to mix in at least one other kind but to each their own
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Pepper Jack — Great if you like extra spice without adding too much heat
You can use just one or blend a couple. I’m in the no cheese is the only bad cheese camp!
Optional Add-Ins
This is a flexible breakfast casserole that invites customization:
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Cooked chorizo
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Cooked breakfast sausage
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Diced ham
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Extra roasted peppers
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Green onions or sautéed onions
Just avoid adding anything with too much moisture like a bunch of raw tomatoes —otherwise your casserole may not set as well.
How to Adjust the Spice Level
This dish is naturally mild because canned green chiles sit low on the heat scale. I usually use one can of mild and one can of hot. This is super mild and generally kid approved.
If you want more heat, try:
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Hot green chiles
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A handful of diced jalapeños
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Pepper Jack cheese
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1/4 teaspoon of cayenne in the egg mixture
If you need zero heat, stick with mild canned green chiles.
Make-Ahead Instructions
One of the reasons this dish is such a great breakfast casserole is that it preps beautifully.
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Make it the night before:
Assemble the entire casserole, cover tightly with foil or plastic wrap, and refrigerate overnight. Bake in the morning as written. Be prepared to add 5–10 minutes to the bake time since it will start in a cold pan. -
Prep components ahead:
Roast chiles, shred cheese, and whisk the egg mixture up to 2–3 days ahead. Store separately and assemble right before baking. -
Bake ahead + reheat:
This casserole reheats like a dream. Bake it fully, cool, cover tightly, and refrigerate. Reheat slices in the microwave or warm the whole dish in the oven at 325°F.
Perfect for holidays, guests, or those mornings where you’re trying to feed people before school drop-off.
How to Adjust The Breakfast Casserole For Different Dietary Needs
Low-Carb / Keto – Use a Keto friendly flour option.
Gluten-Free – Just swap out the flour for your favorite Gluten Free Flour Blend. I use whatever blend is available at Costco.
What to Serve With It – Toppings and Sides
This is really a complete meal by itself but I usually offer hot sauce or salsa and sour cream. The bright acidity of salsa or pico is especially good with the creamy eggs and cheese.
More Favorite Toppings
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Pico de gallo
- Diced avocado
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Chopped cilantro
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Cotija or queso fresco
Breakfast Sides That Compliment This Casserole
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Fresh fruit
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Hash browns or crispy potatoes
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Tortillas (flour or corn)
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Simple green salad
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Refried beans
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Bacon or sausage links
This is a hearty casserole, so light, fresh sides balance it well.
Storage, Freezing & Reheating
This dish stores beautifully—one of the many reasons it’s such a dependable breakfast recipe.
Fridge – Store leftovers in an airtight container for 3–4 days.
Freezer – This casserole freezes really well. It will keep up to 3 months in the freezer.
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Freeze individual slices for grab-and-go breakfasts
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Or freeze the whole cooked casserole tightly wrapped (don’t prep the mixture and freeze without cooking first – not good)
Thaw in the refrigerator.
Reheating – The microwave is quick and easy for single servings. You can also use an air fryer or the oven. The casserole reheats without turning watery, which is always a win for an egg-based breakfast casserole.
FAQs
How long can it sit before baking?
Once assembled, this casserole can sit covered in the refrigerator for up to 24 hours before baking. It’s perfect for prepping the night before. Assembling it in advance does mean that the leavening will be a little less active and the dish will puff a little bit less.
I don’t feel like this impacts it too much but if I have time I like to whip it together in the morning and put it right in. It literally takes 12 minutes to throw together so usually this is my first choice.
Can I double it?
Absolutely! Double all ingredients and bake in two 9×13 baking dishes. Please don’t double it and try to bake it in one pan… That’s not going to end well!
Why did my breakfast casserole puff up and then fall?
This is normal! If you look at the photos in this recipe you can see that my casserole has risen nicely and then settled a bit around the edges.
Egg-based casseroles puff as steam builds and then settle as they cool. It doesn’t affect the flavor or texture—it’s just part of the egg magic. Aren’t you glad eggs exist?!?
How do I know when the casserole is done?
Look for edges that are set and a center that no longer jiggles when you tap the pan. A knife inserted in the middle should come out mostly clean. Overbaking can make it dry, so start checking at the earlier bake time. I’m a big fan of using an instant read thermometer to get it fully done (nobody likes soupy eggs)! I bake it to 200F to get it there without drying it out.
Helpful Kitchen Tools to Make A Breakfast Casserole
- Every cook should own a classic 9″x 13″ glass casserole dish. Buying one with a lid is really helpful particularly for this recipe. Pyrex and OXO both have good options.
Love Easy Brunch Food For a Crowd? Try Some More of My Popular Brunch Recipes:
- Easy Crème Brule French Toast Casserole
- Copycat Cracker Barrel Pancakes
- Crispy Oven Hash Browns
- How to Make Biscuits: A Foolproof Guide to Soft, Fluffy Butter Biscuits
Chile Relleno Breakfast Casserole
Ingredients
- 10 large eggs
- ½ cup all-purpose flour can sub GF flour
- 1 teaspoon baking powder
- 5 cups shredded Mexican Blend or favorite cheese this is a pound
- 1 pint small curd cottage cheese 4% milkfat 16oz
- ½ cup salted butter melted (plus additional butter to grease the baking dish)
- ½ teaspoon seasoning salt
- 2 small cans diced green chilies see note for heat choice
- 2 Tablespoons fresh chives to garnish optional
Instructions
- Preheat oven to 350 F.
- Butter a 9”x13” casserole dish and set aside.
- In a large mixing bowl, beat eggs until light in color.
- Blend in flour, baking powder, cheese, cottage cheese, melted butter and salt.
- Stir in green chilies and pour into the buttered casserole dish. At this point the casserole can go in the fridge overnight if needed. This will cause it to puff a bit less but still be just as tasty.
- Bake uncovered for 40-45 minutes or until the top is golden brown and the center appears firm. (About 200F internal)
- Garnish with chives if desired and serve hot with salsa and sour cream.
- Refrigerate leftovers for up to a week or wrap squares individually and freeze for up to three months.
Helpful Recipe Notes
Your Rating Matters
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Nutrition Estimate
A Note on Nutrition
Nutritional info is an imperfect estimate. Please take it with a grain of salt.
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