Step 1: Marinate the Chicken

1. In a small bowl, mix together the olive oil, lime juice, chipotle chili powder, smoked paprika, garlic powder, cumin, salt, and pepper.
2. Place the chicken breasts (or thighs) in a shallow dish or resealable plastic bag. Pour the marinade over the chicken, ensuring that it is evenly coated. Seal the bag or cover the dish and let the chicken marinate in the refrigerator for at least 20 minutes. For maximum flavor, marinate for 1–2 hours.

Step 2: Prepare the Chipotle Ranch Sauce

1. In a small bowl, combine the ranch dressing, chopped chipotle peppers in adobo sauce, lime juice, smoked paprika, garlic powder, and onion powder. Stir until well combined.
2. Season with salt and pepper to taste, and adjust the heat by adding more chipotle peppers if you prefer a spicier sauce. Set aside.

Step 3: Grill the Chicken

1. Preheat your grill or grill pan to medium-high heat.
2. Remove the chicken from the marinade and discard any excess marinade. Place the chicken on the grill and cook for 5–7 minutes per side (depending on thickness) until the chicken reaches an internal temperature of 165°F (74°C).
3. Let the chicken rest for 5 minutes before slicing it into thin strips or bite-sized pieces.

Step 4: Prepare the Burrito Fillings

1. While the chicken is resting, prepare the other burrito fillings: cook your rice if it’s not already done, rinse and drain the black beans, shred the lettuce, and chop the tomatoes and red onions.
2. If desired, warm the flour tortillas on a dry skillet over medium heat for 30 seconds on each side, just until they become soft and pliable.

Step 5: Assemble the Burritos

1. Lay a warmed tortilla flat on a clean surface. In the center, add a spoonful of rice, followed by a spoonful of black beans, a generous portion of the grilled chicken, and a dollop of the chipotle ranch sauce.
2. Add the shredded lettuce, diced tomatoes, red onion, avocado slices, and a sprinkle of cheese on top.
3. Fold the sides of the tortilla over the filling, then roll it tightly from the bottom to create a sealed burrito.

Step 6: Serve and Enjoy!

1. Serve your Chipotle Ranch Grilled Chicken Burritos with extra chipotle ranch sauce on the side, or enjoy them as-is for a complete, flavorful meal.
2. Optional garnishes: Sprinkle with fresh cilantro, serve with a lime wedge, or add extra salsa or sour cream for an added touch of flavor.