Mexican Brown Rice Bake (Gluten-Free)
Mexican Brown Rice Bake is a bold, comforting, gluten-free casserole that works beautifully for busy weeknights and meal prep. With hearty brown rice, colorful vegetables, black beans, sweet corn, and classic Mexican-inspired spices, this one-pan dinner is both filling and nutrient-packed.

Ingredients (Serves 6)
- 2 cups cooked brown rice
- 1 cup canned black beans, rinsed and drained
- 1 cup corn kernels (fresh, frozen, or canned)
- 1 cup diced tomatoes (or diced tomatoes with green chilies)
- 1/2 cup bell pepper, diced (any color)
- 1/2 cup onion, diced
- 2 garlic cloves, minced
- 1 cup shredded cheese (cheddar, Monterey Jack, or Mexican blend)
- 1 teaspoon chili powder
- 1 teaspoon ground cumin
- 1/2 teaspoon smoked paprika
- 1/2 teaspoon dried oregano
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 1/2 cup salsa (mild, medium, or hot)
- 2 tablespoons olive oil
Optional toppings
- Avocado slices
- Fresh cilantro
- Lime wedges
- Sour cream
Instructions
-
Heat the oven
- Set the oven to 375°F (190°C).
- Lightly grease a 9×13-inch baking dish.
-
Sauté the vegetables
- Warm the olive oil in a skillet over medium heat.
- Cook the onion and bell pepper for 3–4 minutes until softened.
- Stir in the garlic and cook for 1 minute more.
-
Mix the filling
- In a large bowl, combine:
- cooked brown rice
- sautéed vegetables
- black beans, corn, diced tomatoes, and salsa
- chili powder, cumin, smoked paprika, oregano, salt, and pepper
- Mix until everything is evenly coated with seasoning.
- In a large bowl, combine:
-
Assemble
- Spoon the mixture into the prepared baking dish and spread into an even layer.
- Top with shredded cheese.
-
Bake
- Bake uncovered for 20–25 minutes, until the cheese is melted and bubbling.
-
Finish and serve
- Rest for 5 minutes before serving.
- Add toppings like avocado, cilantro, lime, or sour cream, then enjoy warm.
Tips for Best Results
- Make rice ahead: Using leftover brown rice speeds up prep and improves texture.
- Add more veggies: Try zucchini, spinach, or jalapeños for extra color and flavor.
- Easy vegan swap: Use dairy-free cheese or sprinkle nutritional yeast instead.
- Control the heat: Adjust the salsa and chili powder to match your preferred spice level.
Storage and Reheating
- Refrigerator: Keep in an airtight container for up to 4 days.
- Freezer: Freeze single portions for up to 3 months. Thaw overnight in the fridge.
- Reheat: Warm at 350°F (175°C) in the oven or microwave until heated through.
Final Thoughts
This Mexican-inspired brown rice casserole is an easy, customizable, and family-friendly meal that delivers big flavor in one dish. Serve it on its own or pair it with a simple green salad for a complete dinner that’s sure to satisfy.


