Puebla Shrimp Rellenos Casserole Recipe

If you love chiles rellenos but don’t love the deep-frying (and the oil cleanup that follows), meet your new weeknight crush: a layered, oven-baked casserole that channels Puebla’s iconic dish with sweet, briny shrimp, roasted poblanos, and a bright salsa roja. It’s faster than stuffing and battering each chile, lighter on the oil, and sturdy enough to feed a crowdall while keeping the soulful flavor that made the classic famous.

Think of it as the best parts of a shrimp enchilada and a chile relleno getting together in a single pan. The poblanos bring gentle heat and that earthy, almost “meaty” green-chile flavor. The shrimp adds snap and sweetness. Melt-friendly Mexican cheeses stitch everything together so you get stretchy bites and custardy edges without any fussy frying. Yes, seconds are mandatory.

What Is Puebla-Style Chiles Rellenos?

Traditional chiles rellenos hail from the city of Puebla in central Mexico. In the classic form, roasted poblano chiles are stuffedoften with Oaxaca or Chihuahua cheese, or a savory picadillothen coated in a delicate egg batter and fried. Our version keeps the spirit but simplifies the technique by layering the components into a casserole and baking until bubbly. You still get roasted poblanos, luscious cheese, and a lively salsajust delivered in a format that’s easier for busy cooks.

Why Bake It as a Casserole?

• Time saver: No stuffing and battering each chile. Roast, layer, bakedone.
• Less mess: Skip the deep-fry splatter and post-dinner oil disposal.
• Great texture: Roasted poblanos stay tender; shrimp stays juicy; the custard layer puffs slightly for a classic relleno vibe.
• Feeds a crowd: Slices cleanly and reheats well for meal prep.

Ingredients

For the Roasted Poblanos

• 6–8 large poblano peppers (about 1½–2 pounds)
• 1 tablespoon neutral oil (optional, for roasting)
• ½ teaspoon kosher salt

For the Shrimp Filling

• 1½ pounds raw shrimp, peeled and deveined (medium to large; 26/30 or 21/25 count)
• 1 tablespoon olive oil
• 3 cloves garlic, minced
• 1 teaspoon ground cumin
• ½ teaspoon dried oregano (Mexican oregano if available)
• ½ teaspoon smoked paprika or chipotle powder (optional, for a smoky note)
• ¾ teaspoon kosher salt, plus more to taste
• Freshly ground black pepper
• Juice of ½ lime

For the Salsa Roja (Bake Sauce)

• 2 pounds ripe tomatoes (Roma or vine), halved
• 1 small white onion, quartered
• 1–2 jalapeños (seeded for mild)
• 2 cloves garlic, skins on
• ¼ cup cilantro leaves and tender stems
• 1–2 tablespoons apple cider vinegar or fresh lime juice
• 1 teaspoon kosher salt, to taste

For the Cheese/Custard Layers

• 8 ounces Oaxaca cheese, torn into ribbons (or low-moisture mozzarella)
• 6 ounces Chihuahua cheese, shredded (or Monterey Jack)
• 4 large eggs
• ¾ cup evaporated milk or whole milk
• 1 tablespoon all-purpose flour (or cornstarch for gluten-free)
• ¼ teaspoon baking powder (for a lightly puffy top)
• ¼ teaspoon kosher salt

To Finish

• Fresh cilantro, chopped
• Crumbled queso fresco (optional)
• Warm tortillas or rice, for serving
• Lime wedges

Step-by-Step Instructions

1) Roast & Peel the Poblanos

1. Adjust an oven rack 4–6 inches from the broiler and heat the broiler to high. Place poblanos on a foil-lined sheet. Broil, turning every 2–3 minutes, until skins are blistered and blackened in spots (8–12 minutes total). You can also char them over a gas flame or on a hot grilluse whatever is easiest in your kitchen.
2. Transfer hot peppers to a bowl and cover tightly with a plate (or pop into a paper/plastic bag) to steam for 10–15 minutes. This loosens the skins.
3. Peel off the blistered skins with your fingers. Gently slit one side of each chile and remove seeds and membranes. Pat dry to reduce excess moisture.

2) Make the Salsa Roja

1. Arrange tomatoes (cut-side up), onion, jalapeños, and garlic on a baking sheet. Broil until tomatoes are lightly blistered and the edges of the onion char (8–12 minutes). Slip the garlic from its skins.
2. Blend roasted vegetables with cilantro, vinegar or lime juice, and salt until smooth but still slightly textured. Taste and adjust acidity and salt. If very thick, splash in a tablespoon or two of water; if very thin, simmer in a saucepan for 5 minutes to reduce.

3) Quick Sauté the Shrimp

1. Pat shrimp dry. Toss with olive oil, garlic, cumin, oregano, paprika (if using), salt, pepper, and lime juice.
2. Heat a large skillet over medium-high. Sauté the shrimp just until they curl and turn opaque at the edges (about 1–2 minutes per side). They will finish in the ovendon’t overcook now.
3. Roughly chop half the shrimp for distribution; leave the rest whole for meaty bites.

4) Mix the Custard & Prep the Cheeses

1. In a bowl, whisk eggs, milk, flour/cornstarch, baking powder, and salt until smooth. This bakes into a light, custardy blanket that nods to the airy egg coating of traditional rellenos.
2. Combine the Oaxaca and Chihuahua cheeses. Keep a small handful aside for topping.

5) Assemble the Casserole

1. Heat oven to 375°F (190°C). Grease a 9×13-inch baking dish.
2. Spread 1 cup salsa roja in the bottom of the dish.
3. Layer half the peeled poblanos (opened flat) over the sauce. Top with half the shrimp and half the cheese blend.
4. Repeat with remaining poblanos and shrimp. Pour the custard evenly over the top and finish with the reserved cheese.

6) Bake & Rest

1. Bake until the center is just set and the edges are golden and bubbling, 25–35 minutes. A knife inserted near the center should come out mostly clean.
2. Rest 10 minutes. Scatter cilantro and queso fresco. Serve with warm tortillas, rice, and lime wedges.

Timing, Yields & Storage

• Active time: ~35 minutes (roast/peel poblanos, quick-sauté shrimp, blend salsa)
• Bake time: 25–35 minutes
• Servings: 6–8 as a main
• Storage: Refrigerate, covered, up to 3 days. Reheat at 325°F until warmed through. For best texture, add a fresh sprinkle of cheese near the end of reheating.

Pro Tips, Swaps & Make-Ahead

Choose melt-smart cheeses

Oaxaca delivers that gorgeous stretch, while Chihuahua melts ultra-smooth and creamy. Can’t find them? Monterey Jack and low-moisture mozzarella are reliable understudies. A modest pinch of shredded cheddar adds color, but favor the mellow, melty cheeses for a classic profile.

Control the chile heat

Poblanos are typically mild with gentle, earthy heat. Seed and membrane removal further tames the spice. Want more kick? Leave a few seeds in, add a second jalapeño to the salsa, or finish slices with pickled jalapeños.

No soggy casserole

• Roast poblanos until the skins are well blistered; peel, then pat them dry.
• If your salsa is watery, reduce it briefly on the stovetop before assembling.
• Let the casserole rest after baking so slices set cleanly.

Smart shrimp prep

• Dry shrimp well so they sear instead of steam.
• A quick pre-sauté builds flavor, then the oven finishes them gently.
• Use medium or large shrimp; chopping half gives even distribution without losing those satisfying whole pieces.

Make-ahead

• Roast/peel poblanos and blend salsa a day ahead.
• Assemble up to the custard, cover, and refrigerate up to 8 hours; add custard and bake just before dinner.
• Leftovers make phenomenal breakfast with a fried egg on top.

Serving Ideas

• Classic sides: Mexican rice, charro beans, or simply warm tortillas.
• Fresh toppings: Diced avocado, radish matchsticks, or a quick cabbage slaw with lime and cilantro.
• Saucy bonus: Warm extra salsa roja at the table for spooning over each slice.

Frequently Asked Questions

How spicy is this casserole?

It’s gently spicy. Poblanos are on the mild side; seeding plus a mostly mild salsa keeps heat moderate. Add serrano or chipotle if you want to turn it up.

How do I know the shrimp are done?

They’ll turn opaque and gently firm. Because they’re pre-sautéed, the oven is just finishing them off. Avoid prolonged baking after the center setsshrimp overcook fast.

Can I make it dairy-free or gluten-free?

Gluten-free: Use cornstarch instead of flour. Dairy-free: Skip the custard and double the salsa; use a dairy-free melting “mozzarella” alternative and omit queso fresco.

What if I can’t find poblanos?

Anaheim chiles are the next best choice and are commonly available in U.S. supermarkets. Roasting and peeling works the same way.

Condensed, Printable-Style Recipe

Roast 6–8 poblanos under a hot broiler to blister; steam 10–15 minutes; peel and seed. Broil salsa ingredients (2 lb tomatoes, onion, 1–2 jalapeños, 2 garlic) until lightly charred; blend with cilantro, acid, and salt. Season and quick-sauté 1½ lb shrimp with oil, garlic, cumin, oregano, paprika, salt, pepper, lime. Whisk custard of 4 eggs, ¾ cup milk, 1 Tbsp flour/cornstarch, ¼ tsp baking powder, ¼ tsp salt. Layer in 9×13: 1 cup salsa, half poblanos, half shrimp, half of 14 oz cheese; repeat. Pour custard on top; finish with a little cheese. Bake 375°F until set and bubbling (25–35 minutes). Rest 10 minutes; garnish and serve.

Chef’s Notes on Quality & Safety

• Shrimp: Buy fresh or properly thawed, odorless shrimp. Cook just until opaque; carryover heat in a hot casserole finishes them.
• Eggs & custard: The custard should be softly set, not rubbery. Pull the pan as soon as the center barely sets.
• Leftovers: Reheat gently; seafood toughens with aggressive heat.

Cook’s Field Notes: of Hands-On Experience

I tested this casserole a half-dozen ways to make sure it works on harried weeknights and for relaxed weekend dinners. The biggest flavor swing came from how hard I roasted the poblanos. When the skins were only lightly blistered, the peppers tasted grassy and the peel clung stubbornly. When I went all-inreally blistered, deeply charred spotsthe skins slipped off in seconds and the flavor turned smoky-sweet, which made the whole casserole taste like I had babysat a grill for an hour (I hadn’t). If you’re shy about char, don’t be; that’s your shortcut to complexity.

For the shrimp, I tried everything from tiny salad shrimp to jumbo 16/20s. Medium-large (21/25 or 26/30) were the sweet spot: big enough to stay juicy, small enough to distribute evenly. I also tested raw versus pre-seared shrimp. A quick pre-sear (just a minute or two) gave better flavor and a springier texture. Raw shrimp baked fine, but more liquid wept into the casserole and slightly thinned the custard layer. Pre-searing reduced that moisture and gave me a more cohesive slice.

Cheese experiments were fun (and delicious). Oaxaca gave the best stretch and that nostalgic pull you expect from a great chile relleno. Chihuahua melted silk-smooth and added buttery depth. When I swapped in Monterey Jack, the flavor stayed mild and clean, and the melt was excellentso don’t hesitate if that’s what you can find. A small handful of cheddar on top browned prettily but risked overpowering the delicate poblano flavor if I used too much. Balance is key.

The salsa roja taught me to pay attention to moisture. Tomatoes vary wildly: mid-summer fruit can be juicy enough to need a quick stovetop simmer to concentrate; winter tomatoes benefit from a little extra acid (vinegar or lime) to wake them up. If your salsa looks thin, give it 5 minutes at a brisk simmer before assembling the casserole. That one step kept the finished slices neat, not soupy.

Baking time depended on pan choice and oven personality. A true 9×13 glass dish baked a few minutes faster than a metal one and retained heat longer (which helped the rest period). A deeper ceramic dish took the longest. Whatever you use, start checking at 25 minutes. The center should look set but still have a gentle wobble. If you see vigorous bubbling in the very center, pull itoverbaking dries the shrimp and tightens the custard.

Make-ahead trials were a success. Roasting/peeling poblanos and blending the salsa the day before cut my day-of prep to under 20 minutes. I also tried assembling the entire casserole without the custard and refrigerating; adding the custard right before baking kept the top light and tender. Fully baked leftovers reheated best at 325°F, uncovered, with a fresh sprinkle of cheese in the last 5 minutes to restore gloss and aroma.

Finally, toppings. Bright finishes make the casserole sing: chopped cilantro, a squeeze of lime, and a spoon of warm salsa on each slice sharpen the flavors in the best way. If you want a restaurant flourish, dot with crema or Greek yogurt and scatter a few quick-pickled red onions. None of those are mandatory, but they make weeknight dinner feel like a little celebrationand this casserole deserves it.

Conclusion

This Puebla Shrimp Rellenos Casserole respects tradition while embracing practicality. You get the roasted-chile depth, melty cheese, and punchy salsa that made the classic a legendplus tender shrimp for sweetness and proteinwithout any frying drama. Roast hard, season confidently, and let the oven do the work. Dinner is served.