This egg cheese green chile breakfast casserole is a hearty, make-ahead dish that layers fluffy eggs, melty cheese, and roasted green chiles with a golden, crispy top. It’s a beloved Southwestern-style breakfast that’s perfect for feeding a crowd on holidays, brunches, or busy weekday mornings. The combination of creamy eggs, sharp cheddar, and mild or spicy green chiles creates a comforting, flavorful bake that’s as easy to assemble as it is to customize.
Ingredients
- 10 large eggs
- 1 cup (240 ml) whole milk
- 1/2 cup (120 ml) sour cream
- 1 teaspoon (5 g) salt
- 1/2 teaspoon (1 g) black pepper
- 1/2 teaspoon (1 g) garlic powder
- 1 (4 oz / 113 g) can diced green chiles, drained (mild or hot, to taste)
- 2 cups (226 g) shredded sharp cheddar cheese, divided
- 1 cup (113 g) shredded Monterey Jack cheese
- 1/2 cup (75 g) all-purpose flour
- 1 teaspoon (5 g) baking powder
- 1/4 cup (56 g) unsalted butter, melted
- Optional: 1/2 cup (75 g) diced cooked ham or crumbled cooked bacon
- Optional garnish: chopped fresh cilantro or sliced green onions
Instructions
- Preheat your oven to 350°F (175°C). Grease a 9×13-inch (23×33 cm) baking dish with butter or nonstick spray.
- In a large mixing bowl, whisk together the eggs, milk, sour cream, salt, pepper, and garlic powder until completely smooth and slightly frothy.
- Stir in the drained green chiles, 1 1/2 cups (170 g) of the cheddar cheese, and all of the Monterey Jack cheese. If using ham or bacon, fold it in now.
- In a separate small bowl, whisk the flour and baking powder together, then add the melted butter. Stir until the mixture forms a crumbly, paste-like texture (it will be thick).
- Add the flour-butter mixture to the egg mixture and stir until just combined. Do not overmix; a few small lumps are fine.
- Pour the batter into the prepared baking dish. Sprinkle the remaining 1/2 cup (57 g) cheddar cheese evenly over the top.
- Bake for 40–45 minutes, or until the casserole is puffed, golden brown on top, and a knife inserted in the center comes out clean. The internal temperature should read at least 160°F (71°C) as the safe minimum for egg dishes, per USDA FSIS guidelines.
- Let the casserole rest for 5–10 minutes before slicing and serving. Garnish with cilantro or green onions if desired.
Tips
- Drain the chiles well: Excess liquid from the canned chiles can make the casserole watery. Press them with a spoon or paper towel to remove as much moisture as possible.
- Use a mix of cheeses: Sharp cheddar gives flavor, while Monterey Jack adds creaminess. You can substitute with Colby, Pepper Jack, or a Mexican blend.
- Don’t overbake: The casserole should be just set in the center. Overbaking makes it dry and rubbery. Start checking at 35 minutes.
- Make it ahead: Assemble the casserole the night before, cover, and refrigerate. Bake it the next morning, adding 10–15 minutes to the baking time.
Serving Suggestions
Serve this casserole warm with a side of fresh fruit, sliced avocado, or a simple green salad. It pairs beautifully with warm tortillas or crusty bread. For a full brunch spread, add roasted potatoes, refried beans, or a drizzle of salsa or hot sauce on top. A dollop of sour cream or Greek yogurt also works well.
Variations
- Vegetarian: Omit the ham or bacon and add sautéed onions, bell peppers, or mushrooms.
- Spicy: Use hot green chiles or add a finely chopped jalapeño (seeded for less heat) to the egg mixture.
- Gluten-free: Replace the all-purpose flour with a 1:1 gluten-free flour blend. The texture will be slightly denser.
- Southwest style: Add 1 cup (150 g) of cooked black beans and 1/2 cup (75 g) of corn kernels for extra heartiness.
- Dairy-free: Use unsweetened almond milk or oat milk instead of whole milk, and dairy-free cheese alternatives. Omit the sour cream or use a dairy-free version.
Storage and Reheating
Refrigerate leftovers in an airtight container for up to 3–4 days. To reheat, place a slice on a microwave-safe plate and heat in 30-second intervals until warmed through, or reheat in a 350°F (175°C) oven for 10–15 minutes. You can also freeze the baked casserole for up to 2 months. Wrap it tightly in plastic wrap and foil, then thaw overnight in the fridge before reheating.
Frequently Asked Questions
Can I use fresh green chiles instead of canned? Yes. Roast 2–3 fresh Hatch or Anaheim chiles over a gas flame or under a broiler until charred, then steam them in a bowl, peel off the skins, and dice. Use about 1/2 cup (75 g) of prepared chiles.
Why is my casserole watery? This usually happens if the chiles weren’t drained well, or if the casserole was underbaked. Make sure to drain the chiles thoroughly and bake until the center is fully set.
Can I make this without sour cream? Yes, substitute with an equal amount of plain Greek yogurt or buttermilk. The texture will be slightly tangier but still creamy.
Can I use egg substitute? For a lower-cholesterol version, you can replace up to half of the eggs with egg whites. However, using all egg substitute may change the texture and make the casserole less fluffy.
How do I know when it’s done? Insert a knife into the center; it should come out clean, and the top should be golden brown. A food thermometer should read at least 160°F (71°C) for food safety.
Can I add more vegetables? Absolutely. Sautéed spinach, zucchini, or roasted red peppers are great additions. Just make sure to squeeze out excess moisture from cooked vegetables before adding.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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