If you love the classic flavors of chile rellenos but want an easier, family-friendly way to enjoy them, this chile rellenos casserole recipe is your new go-to. It combines roasted poblano peppers, creamy cheeses, and a lightly spiced tomato sauce baked into a comforting casserole that’s perfect for weeknight dinners or casual gatherings.
Easy to assemble and packed with bold, authentic flavors, this chile rellenos casserole will quickly become a favorite in your recipe rotation. You’ll appreciate how the layers of tender peppers, cheese, and sauce meld together into a deliciously satisfying dish that everyone will ask for seconds of.
Why You'll Love This Recipe
- Simple to prepare with everyday ingredients and minimal prep work.
- Full of rich, cheesy flavor balanced by smoky roasted poblanos.
- Perfect for feeding a crowd or meal prepping for the week.
- Gluten-free and customizable with your favorite cheeses or add-ins.
- A comforting casserole that brings the best of traditional chile rellenos without frying.
Ingredients
Gather these fresh and flavorful ingredients to create your chile rellenos casserole.
- 6 medium poblano peppers, roasted, peeled, and seeded
- 2 cups shredded Monterey Jack cheese
- 1 cup shredded sharp cheddar cheese
- 1/2 cup diced white onion
- 3 cloves garlic, minced
- 1 (14 oz) can diced tomatoes, drained
- 1 cup sour cream
- 1/2 cup whole milk
- 3 large eggs
- 1/2 teaspoon ground cumin
- 1/2 teaspoon smoked paprika
- 1/4 teaspoon cayenne pepper (optional)
- 1 tablespoon olive oil
- 1 teaspoon salt, divided
- 1/2 teaspoon black pepper
- Fresh cilantro for garnish
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Recipe Details
- Prep Time: 25 minutes
- Cook Time: 35 minutes
- Total Time: 1 hour
- Servings: 6
- Calories: Approximately 340 per serving
How to Make Chile Rellenos Casserole
- Preheat your oven to 375°F and lightly grease a 9x13-inch baking dish with olive oil.
- Roast the poblano peppers over a gas burner flame or under the broiler, turning until the skin is blistered and blackened, about 8-10 minutes. Place them in a bowl covered with plastic wrap for 10 minutes, then peel off the skins, remove seeds, and slice into strips.
- In a skillet, heat olive oil over medium heat. Sauté diced onion and minced garlic until translucent and fragrant, about 3-4 minutes. Add drained diced tomatoes, cumin, smoked paprika, cayenne (if using), and half the salt; cook for 5 more minutes until the mixture thickens slightly. Remove from heat.
- In a mixing bowl, whisk together eggs, sour cream, milk, remaining salt, and pepper until smooth.
- Layer half of the roasted poblano strips evenly in the prepared baking dish. Spread half the tomato-onion mixture over the peppers, then sprinkle half of the Monterey Jack and cheddar cheeses.
- Repeat the layering with the remaining poblano strips, tomato mixture, and cheeses.
- Pour the egg and sour cream mixture evenly over the entire casserole, allowing it to soak through the layers.
- Bake uncovered for 30-35 minutes until the casserole is set, golden on top, and slightly bubbly around the edges.
- Let rest for 10 minutes before slicing. Garnish with fresh cilantro and serve warm with optional sour cream or salsa on the side.
Tips for the Best Results
- Make sure to thoroughly peel the roasted poblanos to avoid bitter charred skin in the casserole.
- Use a combination of Monterey Jack and sharp cheddar for the best melty and tangy cheese flavor.
- Don’t skip resting the casserole after baking — it helps the layers set for clean slices.
- If you prefer less heat, remove all seeds from the poblanos and omit cayenne pepper.
- For extra depth, add cooked crumbled chorizo or ground beef between the layers.
Storage and Reheating
Store any leftover chile rellenos casserole covered tightly in the refrigerator for up to 4 days. It reheats beautifully in the oven or microwave, retaining its cheesy texture and rich flavors.
You can also freeze portions in airtight containers for up to 2 months. Thaw overnight in the fridge before reheating in a 350°F oven until warmed through.
Frequently Asked Questions
Can I use different peppers instead of poblanos?
Yes, mild green bell peppers or Anaheim peppers can be used as alternatives, but poblanos provide the signature smoky flavor that makes this casserole special.
Is this casserole gluten-free?
Absolutely! This chile rellenos casserole contains no wheat or gluten ingredients, making it safe for gluten-sensitive diets.
Can I make this recipe vegetarian or vegan?
For a vegetarian version, omit any meat additions and use plant-based cheese substitutes to make it vegan-friendly. Replace eggs and dairy with vegan alternatives like tofu or cashew cream.
What sides pair well with chile rellenos casserole?
Serve with Mexican rice, refried beans, or a fresh green salad for a complete meal. Guacamole and chips also complement the flavors nicely.