This one-pan ground turkey casserole is a quick, high-protein weeknight dinner. Black beans, corn, and melted cheese make it a family favorite with minimal cleanup.

Ingredients

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Instructions

Step 1

Preheat your oven to 375°F (190°C). While the oven heats, prepare all your ingredients. Dicing the onion and bell pepper into uniform small pieces ensures even cooking. Mince the garlic finely so it distributes flavor without burning. Drain and rinse the black beans thoroughly under cold water to remove excess sodium and starch, which helps prevent a mushy texture. Measure out the corn (no need to thaw if frozen), spices, and broth so everything is ready to go. This mise en place approach makes the cooking process seamless and prevents any last-minute scrambling.

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Step 2

Heat the olive oil in a large oven-safe skillet (preferably 12-inch cast iron or stainless steel) over medium-high heat. Once the oil shimmers, add the ground turkey. Break the meat apart with a wooden spoon into small crumbles. Cook without stirring for about 3 minutes to develop a nice brown crust—this is where deep savory flavor comes from. Then continue to cook, stirring occasionally, until the turkey is no longer pink, about 5-6 minutes. If there is excess liquid, drain it off (but lean turkey usually produces little). The turkey should be golden brown and fragrant.

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Step 3

Reduce the heat to medium. Add the diced onion and bell pepper to the skillet. Sauté for 3-4 minutes until the onion becomes translucent and the pepper softens. The moisture from the vegetables will help deglaze any browned bits stuck to the pan, incorporating that flavor into the dish. Add the minced garlic and cook for 30 seconds until fragrant, stirring constantly to prevent burning.

Step 4

Stir in the chili powder, cumin, smoked paprika, salt, and black pepper. Cook the spices for about 1 minute, stirring, until they become aromatic. This blooming step intensifies their flavor and eliminates any raw taste. The mixture should look deeply colored and smell wonderfully warm and smoky.

Step 5

Add the drained black beans, corn, diced tomatoes with green chiles (with their juices), and chicken broth. Stir everything together until well combined. Bring the mixture to a gentle simmer. Let it cook for 5 minutes, stirring occasionally, allowing the flavors to meld and the liquid to reduce slightly. The mixture should be thick and hearty, not soupy. Taste and adjust seasoning if needed.

Step 6

Remove the skillet from the heat. Sprinkle the shredded cheese evenly over the top. Transfer the skillet to the preheated oven. Bake for 15-20 minutes, until the cheese is melted and bubbly and the edges are lightly browned. For a golden top, switch to broil for the last 1-2 minutes, watching carefully to avoid burning.

Step 7

Remove the skillet from the oven (use oven mitts—the handle will be hot!). Let the casserole rest for 5 minutes before serving. This allows the sauce to thicken slightly and the flavors to settle. Garnish with fresh chopped cilantro. Serve directly from the skillet or scoop into bowls. Enjoy with a side of tortilla chips, a dollop of sour cream, or sliced avocado for extra creaminess.

For best results

  • Use a high-quality oven-safe skillet like cast iron or stainless steel. Non-stick skillets are not recommended for oven use above 400°F unless specifically labeled. Cast iron provides excellent heat retention and even browning, plus it goes from stovetop to oven seamlessly. If you don't have an oven-safe skillet, transfer the mixture to a 9×13 baking dish before adding cheese and baking.
  • Lean ground turkey (93/7) is ideal for this casserole because it provides enough fat for flavor without making the dish greasy. If you use extra-lean (99/1), add a splash more olive oil to prevent dryness. Dark meat ground turkey adds richness but increases calories and fat. For the best texture, avoid overworking the meat—break it into large chunks rather than tiny bits.
  • To save time on busy weeknights, prep the vegetables and measure the spices up to 2 days in advance. Store them in separate containers in the fridge. You can also cook the turkey and vegetable mixture completely, then refrigerate for up to 3 days. When ready to bake, simply reheat on the stovetop, top with cheese, and bake as directed. This is a great meal prep strategy.
  • For a deeper smoky flavor, consider using fire-roasted diced tomatoes instead of regular ones. The charred notes complement the cumin and chili powder beautifully. If you can't find diced tomatoes with green chiles, substitute a can of plain diced tomatoes plus a small can of chopped green chiles (or 1-2 teaspoons of canned jalapeño for heat).
  • Don't skip the resting step after baking. This allows the casserole to set so it doesn't turn soupy when served. The starches from the beans and the slight reduction during baking create a natural thickener. If the casserole seems too liquidy before baking, simmer it a few extra minutes on the stovetop to reduce the sauce.
  • The cheese choice matters. Mexican blend cheese melts beautifully and has a mild flavor that doesn't overpower. For a sharper taste, use half sharp cheddar and half Monterey Jack. If you want a healthier option, reduce the cheese to 1/2 cup or use a reduced-fat blend. For a dairy-free version, use a vegan shredded cheese that melts well (look for brands with tapioca starch).

Variations

  • Vegetarian Version: Replace the ground turkey with two cans of black beans (drained) or a 12-ounce package of plant-based crumbles. If using crumbles, sauté them in oil until browned, then proceed. Add extra vegetables like zucchini or bell peppers for bulk. The protein content will be slightly lower, but fiber increases. You can also add 1/2 cup of cooked quinoa for a complete protein boost.
  • Spicy Southwestern: Kick up the heat by adding 1 diced jalapeño (seeds included) with the onion and bell pepper. Use hot Rotel or add 1/2 teaspoon cayenne pepper along with the chili powder. For extra smoky heat, stir in 1-2 chipotle peppers in adobo sauce (minced). Serve with a drizzle of hot sauce and sliced fresh jalapeños on top.
  • Low-Carb / Keto Adaptation: Omit the black beans and corn entirely. Instead, add 1 cup of cauliflower rice (frozen or fresh) and 1 cup of diced zucchini. You can also add 1/2 cup of chopped mushrooms for umami. The dish will be lower in carbs but still satisfying. Increase the cheese to 1.5 cups for extra richness. Serve with a side of avocado or a green salad.
  • Chicken or Beef Swap: Substitute ground turkey with ground chicken, lean ground beef (90/10), or ground pork. For ground beef, drain excess fat after browning. Ground chicken cooks similarly to turkey but may be slightly more moist. If using ground pork, add a pinch of dried oregano for a different flavor profile. Adjust cooking times as needed.
  • Tex-Mex Rice Casserole: Turn this into a heartier meal by adding 1 cup of cooked white or brown rice after the broth step. Reduce the chicken broth to 1/2 cup since the rice will absorb liquid. The casserole will be more filling and stretch to 8 servings. You can also use cauliflower rice for a low-carb option. If adding rice, bake for an extra 5 minutes to ensure everything is heated through.
  • Creamy Southwestern: For a creamier texture, stir in 4 ounces of cream cheese (cut into cubes) after adding the broth. Let it melt and stir until smooth. You can also add 1/2 cup of sour cream or Greek yogurt just before baking (do not boil after adding dairy to prevent curdling). This variation is richer and pairs well with a squeeze of lime juice at the end.

Nutrition

  • Calories385 kcal
  • Total Fat16g
  • Saturated Fat7g
  • Cholesterol85mg
  • Sodium720mg
  • Total Carbohydrates28g
  • Dietary Fiber7g
  • Sugars5g
  • Protein32g

Common Questions

Can I make this casserole ahead of time?
Yes, absolutely! You can assemble the entire casserole (without the cheese topping) up to 2 days in advance. Prepare the turkey and vegetable mixture, transfer to a baking dish if needed, let it cool completely, then cover and refrigerate. When ready to bake, let it sit at room temperature for 20 minutes, then top with cheese and bake as directed, adding 5-10 minutes to the baking time since it starts cold. You can also freeze the unbaked casserole for up to 3 months; thaw overnight in the fridge before baking.
How do I store leftovers and how long do they last?
Store leftover casserole in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave for 1-2 minutes or in a 350°F oven for about 10 minutes. The flavors actually meld and improve after a day! You can also freeze leftovers in freezer-safe containers for up to 3 months. Thaw overnight in the fridge and reheat gently to avoid drying out.
Can I use a different type of cheese?
Certainly! Any good melting cheese works. Cheddar, Monterey Jack, Pepper Jack, Colby, or a combination are all great choices. For a more authentic southwestern flavor, try a blend of sharp cheddar and Monterey Jack. If you want a smoky taste, use smoked gouda or provolone. Avoid cheeses that don’t melt well, like feta or goat cheese, unless you sprinkle them on after baking as a garnish.
Is this casserole gluten-free?
Yes, this recipe is naturally gluten-free as long as all your ingredients are certified gluten-free. Check labels on chicken broth (some brands may contain wheat), diced tomatoes with green chiles, and spices (some spice blends contain anti-caking agents with gluten). Most brands are safe, but it’s always good to verify. Serve with corn tortilla chips or a side of rice to keep the meal completely gluten-free.
Can I add more vegetables?
Absolutely! This casserole is very versatile. You can add diced zucchini, yellow squash, mushrooms, or spinach. For zucchini and squash, add them when you sauté the onion and pepper; they will cook down nicely. For mushrooms, add them after the turkey has browned. For spinach, stir in a few handfuls during the last 2 minutes of stovetop cooking; it will wilt quickly. Adding veggies increases the nutrient density and fiber without compromising flavor.
What can I serve with this casserole?
This casserole is a complete meal on its own, but you can serve it with a variety of sides. Classic options include warm tortilla chips, a side of Mexican rice, or a simple green salad with lime vinaigrette. For a low-carb meal, serve with cauliflower rice or sliced avocado. You can also top each serving with sour cream, Greek yogurt, sliced jalapeños, or a squeeze of fresh lime juice for brightness.
Can I use fresh corn instead of frozen?
Yes, fresh corn is wonderful in this casserole. If using fresh corn on the cob, you’ll need about 1-2 ears, which yields roughly 1 cup of kernels. Cut the kernels off the cob and add them raw to the skillet; they will cook through during the simmering and baking. Fresh corn adds a sweet crunch. If corn is out of season, frozen corn is a perfect substitute—no need to thaw, just add straight from the bag.