This Instant Pot Mexican casserole brings together classic Tex-Mex flavors into a hearty, one-pot meal ready in under an hour. With beans, rice, seasoned ground meat, veggies, and plenty of cheese, it’s the ultimate comfort food for busy weeknights. The Instant Pot makes it effortless—no need to pre-cook rice or dirty multiple pans, just layer, pressure cook, and serve!
Ingredients
- 1 pound ground beef (or ground turkey or chicken)
- 1 medium yellow onion, diced (about 1 cup)
- 3 cloves garlic, minced
- 1 bell pepper, diced (any color, about 1 cup)
- 1 cup long-grain white rice (uncooked, rinsed well)
- 1 (15-ounce) can black beans, drained and rinsed
- 1 (14.5-ounce) can diced tomatoes with green chilies (e.g., Rotel, undrained)
- 1 cup frozen corn (no need to thaw)
- 1 (8-ounce) can tomato sauce
- 1 1/4 cups low-sodium chicken broth (or vegetable broth)
- 2 tablespoons taco seasoning (store-bought or homemade)
- 1 teaspoon kosher salt
- 1/2 teaspoon black pepper
- 1 1/2 cups shredded Mexican blend cheese (divided)
- 2 tablespoons chopped fresh cilantro (optional, for garnish)
- Sliced jalapeños, sour cream, and avocado (optional, for serving)
Instructions
- Prep the Instant Pot: Set your Instant Pot to Sauté mode. Once hot, add the ground beef and cook, breaking it up with a spoon, until browned, about 5-7 minutes. Drain excess fat if needed.
- Sauté vegetables: Add diced onion, garlic, and bell pepper. Sauté for 2-3 minutes until the onion is translucent and veggies are slightly softened.
- Deglaze: Pour in a splash of broth and use a wooden spoon to scrape any browned bits from the bottom of the pot (this helps prevent the burn warning).
- Add remaining ingredients: Stir in the rinsed rice, black beans, diced tomatoes (with their liquid), corn, tomato sauce, remaining broth, taco seasoning, salt, and pepper. Stir well to combine and ensure rice is submerged in the liquid. Do not add the cheese yet.
- Pressure cook: Lock the lid in place and set the valve to Sealing. Cook on Manual/High Pressure for 8 minutes.
- Natural release: Allow the pressure to release naturally for 10 minutes, then carefully switch the valve to Venting to release any remaining pressure.
- Finish and serve: Open the lid and fluff the casserole gently with a fork. Sprinkle 1 cup of shredded cheese over the casserole, then close the lid and let it sit (with the Instant Pot off) for 2-3 minutes until the cheese melts.
- Garnish and enjoy: Serve warm, topped with extra cheese, cilantro, sliced jalapeños, avocado, and a dollop of sour cream if desired.
Tips
- Meat substitutions: Ground turkey or chicken can replace beef for a lighter casserole. For a vegetarian version, omit meat and add an extra can of beans or 8 ounces of diced mushrooms.
- Rice matters: Rinse rice thoroughly to remove excess starch, which helps prevent sticking and mushiness. Use long-grain white rice for best texture; brown rice requires a longer cook time (see Variations).
- Prevent burn warning: Always deglaze the pot after sautéing and before adding remaining ingredients. Make sure the rice is fully submerged in liquid and avoid stirring after adding tomatoes to minimize the risk of burning.
- Cheese tips: For best melt and flavor, shred your own cheese. Pre-shredded cheese works but may not melt as smoothly due to anti-caking agents.
Serving Suggestions
This casserole is a complete meal, but you can make it even more festive by serving with:
- Freshly chopped cilantro, green onions, or diced tomatoes
- Slices of ripe avocado or a scoop of guacamole
- Crispy tortilla chips or warm flour tortillas on the side
- A squeeze of lime juice for brightness
- A simple green salad or a side of sautéed zucchini for extra veggies
- Pickled jalapeños or hot sauce for those who like it spicy
Variations
- Vegetarian: Omit the meat and add a second can of beans (pinto or kidney beans work well) or 1 cup of diced zucchini and 1 cup of chopped mushrooms for extra heartiness.
- Spicy: Add 1-2 minced chipotle peppers in adobo sauce or a diced fresh jalapeño with the onions for a smoky, spicy kick.
- Cheesy Top: After pressure cooking, transfer the casserole to a baking dish, top with extra cheese, and broil for 2-3 minutes for a bubbly, golden finish.
- Brown rice: Substitute brown rice for white rice, but increase the broth to 1 3/4 cups and pressure cook for 22 minutes instead of 8. Allow for the same 10-minute natural release.
- Low-carb: Replace rice with riced cauliflower (add after pressure cooking and let it steam in the residual heat for 2-3 minutes) for a lower-carb option.
- Extra veggies: Stir in 1 cup of baby spinach or frozen peas after pressure cooking for added greens.
Storage and Reheating
Let the casserole cool to room temperature before transferring to an airtight container. Store in the refrigerator for up to 4 days. To freeze, portion into freezer-safe containers and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.
- Microwave: Reheat individual portions in a microwave-safe dish, covered, for 2-3 minutes, stirring halfway through.
- Oven: Place casserole in an oven-safe dish, cover with foil, and bake at 350°F (175°C) for 20-25 minutes until heated through.
- Instant Pot: Use the Sauté function to gently reheat, stirring frequently and adding a splash of broth if needed to prevent sticking.
Always ensure leftovers are reheated to an internal temperature of 165°F (74°C) for food safety.
Frequently Asked Questions
- Can I use brown rice instead of white rice?
- Yes, but brown rice requires more liquid and a longer cook time. Use 1 3/4 cups broth and pressure cook for 22 minutes. The casserole will be heartier, and the texture of the rice will be chewier.
- Can I make this casserole ahead of time?
- Absolutely. Prepare the casserole as directed, let it cool, and store in the refrigerator for up to 4 days. Reheat in the microwave or oven when ready to serve. You can also assemble the ingredients (except rice and broth) the night before for a quicker start on busy days.
- Why did my Instant Pot show a burn warning?
- This can happen if there are browned bits stuck to the bottom after sautéing or if the rice isn’t fully submerged in liquid. Always deglaze the pot after browning meat and make sure to layer the ingredients as directed, with tomatoes and sauce on top, and avoid stirring after adding the tomatoes.
- Is this recipe gluten-free?
- Yes, as long as you use certified gluten-free taco seasoning and broth. Most rice, beans, and vegetables are naturally gluten-free, but always check ingredient labels to be sure. Serve with gluten-free toppings and sides as needed.
- How can I make this casserole dairy-free?
- Omit the cheese or use your favorite dairy-free cheese alternative. The casserole will still be flavorful thanks to the spices, beans, and tomatoes. Top with avocado or a dollop of dairy-free yogurt for creaminess.
- Can I double this recipe?
- Yes, if your Instant Pot is 8 quarts or larger. Do not fill past the max fill line. Cooking time remains the same, but allow extra time for the pot to come to pressure. Stir well before serving and check that everything is heated through.