In a small bowl add smoked paprika, oregano, garlic powder, kosher salt, onion powder, cumin, white pepper, and cayenne. Mix until well combined.
Blackened Chicken Breasts
In a medium mixing bowl, add the chicken breast, oil, and all of the blackening spice. Using tongs, turn the chicken breasts over a few times to fully coat them in the spice & oil. Cover the bowl and refrigerate for 30 minutes - 6 hours to marinate.
Heat a large cast iron skillet over high heat. Add the chicken breasts and all of the spice/oil mixture into the skillet, searing on both sides until golden brown.
Lower the heat to medium, loosely tent the chicken breast with aluminum foil and cook the chicken breast until well done, flipping regularly for about 15-20 minutes. Or until the thickest part of the chicken breast reads 165℉ internally.
Turn the heat to low and add the cheese on top of the chicken breasts. Recover the skillet loosely with aluminum foil and let the cheese melt for 1-2 minutes.
Remove chicken breasts from the skillet and let rest for 5-10 minutes.
Spicy Mayo Aioli
In a small bowl, combine the mayonnaise, salsa, salt and pepper. Stir well to fully combine and set aside or refrigerate until ready to use.
Assemble the Blackened Chicken Sandwiches
Spread 1-2 tablespoons of spicy mayo on both the top and bottom of the bun. Add one of the blackened chicken breasts, shredded lettuce, tomato, and red onions. Serve immediately.
Notes
This sandwich recipe is very mild, to make it spicier increase the amount of cayenne in the spice blend and add sriracha to the spicy mayo.
To make this blackened chicken sandwich vegan, substitute the chicken breast for a cauliflower steak or extra firm tofu. Use plant-based cheese and vegan mayonnaise in the spicy aioli.
Use gluten-free buns or lettuce wraps to make these gluten-free (plus ensure that all other ingredients are gluten-free or made in a gluten-free facility)
The chicken can be cooked in the Air Fryer if desired. Cook at 375°F for 20 minutes or until the chicken is 165°F internally.
Allow the blackened chicken to rest after cooking to enhance the juicy tender meat.
Use a high smoke point oil such as vegetable oil, canola oil or avocado oil.
Marinate chicken for a minimum of 30 minutes, up to 6 hours before cooking the blackened chicken.