This casserole takes roasted poblano peppers, pre-cooked ground chicken, sour cream, salsa, and two melting cheeses and bakes them together in one dish. It comes together in 40 minutes and produces enough for four solid servings. The honest reason to make it: the poblano-roasting step does most of the flavor work, and the rest is just mixing and baking.
Shopping notes
- Poblano peppers: Look for firm, dark green peppers without soft spots. Size matters here — medium poblanos give you enough flesh after peeling and seeding. Very small ones shrink to almost nothing after roasting.
- Ground chicken: The recipe calls for 3 cups pre-cooked. If you’re buying raw, roughly 1.25 lbs raw ground chicken will cook down to about 3 cups. Cook it to an internal temperature of 165°F (74°C) — no pink, no exceptions.
- Colby Jack and cheddar: Block cheese shredded at home melts more evenly than pre-shredded bags, which contain anti-caking starch. Worth the extra two minutes if you have a box grater.
- Salsa: Any jarred salsa works. A chunkier salsa adds more texture; a smooth one blends in more. Either is fine — just avoid anything labeled “restaurant-style” with high water content, which can make the casserole watery.
The short version of why this works
Two things carry this recipe. First, charring the poblanos properly — until the skin blisters and blackens in patches — develops a smoky depth that raw or lightly cooked peppers simply don’t have. Steaming them under a towel for 10 minutes after charring is what loosens the skin enough to scrape off cleanly; rush that step and you’ll fight the skin the whole time. Second, mixing half the cheese directly into the filling rather than just layering it on top means the cheese binds the sour cream and salsa into a cohesive, creamy mixture instead of a loose pile that separates in the oven. The top layer of cheese then browns and sets a crust that holds each serving together when you scoop it out. Skip the garnish — not worth the extra dish when the filling already has cilantro and green onion built in.
What can go wrong
- Watery casserole: This happens when the cooked ground chicken retains too much moisture or the salsa is very liquid. Drain the cooked chicken well and pat it with paper towels before mixing. If your salsa looks thin, strain off a tablespoon or two of liquid first.
- Skin that won’t come off the peppers: The char wasn’t deep enough, or the steaming time was cut short. The skin needs to be genuinely blackened in most spots, not just lightly browned. Give the peppers the full 10-minute steam — longer is fine.
- Filling that tastes flat: Ground chicken is mild. If the mixture tastes underseasoned before it goes into the dish, add a pinch of salt and a little more salsa before baking. Taste the filling in the bowl — it won’t get more seasoned in the oven.
- Cheese that browns too fast before the center is hot: If your oven runs hot or you’re using a shallow dish, tent the casserole loosely with foil for the first 20 minutes, then uncover for the last 10 to brown the top.
- Uneven heat in the center: A cold casserole dish pulled straight from the fridge takes longer to heat through. Let the assembled dish sit at room temperature for 10–15 minutes before it goes into the oven, especially if you prepped it ahead.
Leftovers and meal prep
Stored in an airtight container, this casserole keeps in the fridge for up to 4 days. It reheats well in the microwave in 90-second bursts, or covered with foil in a 350°F oven for about 15 minutes — the oven method keeps the cheese from turning rubbery. For freezing, portion it into individual servings before freezing; it keeps well for up to 2 months. Thaw overnight in the fridge before reheating. If you’re planning ahead for the week, the ground chicken can be cooked and the poblanos can be roasted, peeled, and chopped up to 2 days in advance and stored separately in the fridge — then the whole casserole takes under 10 minutes to assemble on the night you want to bake it.
Cheesy Chicken Poblano Casserole
Equipment
Ingredients
- 3 medium poblano peppers
1 lb ground chicken - pre-cooked and crumbled, about 450g
⅓ cup salsa - mild or medium, store-bought or homemade, 80ml
½ cup sour cream - 120g
¼ cup green onions - chopped, 25g
1 cup Colby Jack cheese - shredded, 115g
1 cup cheddar cheese - shredded, 115g
2 tablespoons cilantro (coriander) - chopped, 5g
Instructions
- Wash and dry poblano peppers. Place them on a baking sheet lined with foil and set under the broiler on high, about 4 inches from the heat source. Broil for 3-4 minutes per side, turning with tongs, until the skin is blistered and charred in patches. If using a gas stove, you can also char them directly over an open flame using tongs. Note: If your electric oven’s broiler cycles off, crack the oven door slightly to keep the element running continuously.3 medium poblano peppers
- Once peppers are charred, place in a bowl, cover with a clean, dry towel, and let rest for 10 minutes. Doing this will help make removing the skin much easier!3 medium poblano peppers
- Once peppers have steamed, take a knife and scrape away the charred skin.3 medium poblano peppers
- Slice the top off the pepper, then slice it in half, exposing the seeds and veins; carefully scrape out as much of the seeds and veins as you would like, remember the heat is in the seeds and veins. Chop poblano.3 medium poblano peppers
- Set oven to 375°F / 190°C (170°C fan-forced). If you used the broiler for the poblanos, simply switch to bake mode and adjust the temperature.
- In a bowl, mix the chicken, sour cream, salsa, green onions, cilantro and half the shredded cheese and the chopped poblano pepper.3 medium poblano peppers, 1 lb ground chicken, 1/3 cup salsa, 1/2 cup sour cream, 1/4 cup green onions, 1 cup Colby Jack cheese, 1 cup cheddar cheese, 2 tablespoons cilantro (coriander)
- Spread the poblano-chicken mixture evenly into an 8×8-inch (20x20cm) casserole dish (or 11×7-inch / 28x18cm). Top with the remaining shredded cheese in an even layer.1 cup Colby Jack cheese, 1 cup cheddar cheese
- Bake for 25-30 minutes until bubbly around the edges and the cheese is golden brown on top. The internal temperature should reach at least 165°F / 74°C. Let rest for 5 minutes before serving to allow the filling to set.
Notes
Nutrition
Common questions
Can I use raw ground chicken instead of pre-cooked?
No — the bake time isn’t long enough to safely cook raw ground chicken through in a dense casserole mixture. Cook the ground chicken in a skillet first, reaching an internal temperature of 165°F (74°C) with no pink remaining, then let it cool slightly before mixing.
How spicy are poblano peppers?
Poblanos are mild to medium — most people find them closer to a bell pepper than a jalapeño. The heat lives in the seeds and veins, so removing them thoroughly keeps the dish family-friendly; leaving more in adds a noticeable but not aggressive kick.
Can I assemble this casserole the night before and bake it the next day?
Yes, and it works well that way. Assemble the casserole, cover it tightly, and refrigerate for up to 24 hours before baking. Take it out of the fridge while the oven preheats and add 5 minutes to the bake time to account for the cold start.
What can I use instead of sour cream?
Full-fat plain Greek yogurt is the most direct swap and holds up fine in the oven. Cream cheese softened and stirred in also works and makes the filling slightly richer and thicker.
Can I substitute a different pepper if I can’t find poblanos?
Anaheim peppers are the closest substitute — similar size, mild heat, and they char and peel the same way. Green bell peppers work in a pinch but lack the smoky character that makes this dish distinctive.
If you liked this one
- Spicy Beef Stuffed Peppers
- Hearty Beef Cauliflower Bake
- Colombian Chicken Cheese Empanadas
- Chicken Macadamia Sausage Rolls
