Name: Blackened Chicken Sandwiches
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Ingredients: 4 boneless skinless chicken thighs; 1 teaspoon garlic powder; ½ teaspoon paprika; ½ teaspoon smoked paprika; 1 sprig fresh thyme; 1 teaspoon onion powder; 1/2 teaspoon cayenne pepper; ½ teaspoon oregano; 1 teaspoon salt; ½ teaspoon black pepper; 1 tablespoon olive oil; 1/4 cup mayonnaise; 1 tablespoon lime juice; 1 tablespoon hot sauce; 4 hamburger or brioche buns; 4 pieces lettuce; 1 tomato (sliced)

These Blackened Chicken Sandwiches are spicy and seasoned to perfection. Made in just 20 minutes, this is truly an iconic chicken sandwich lineup. Juicy chicken thighs seasoned with irresistible Cajun flavors, then layered on a toasted bun with all the right toppings-this sandwich is packed with flavor and so easy to make.

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What is Blackening?
Ingredients
Substitutions & Variations
Instructions
Sarah's Top Tips
Serving
Storage & Reheating
More Sandwich Recipes to Try
Blackened Chicken Sandwiches
Comments

I keep a jar of this spice mix pre-mixed in my cupboard at all times, right next to the salt and pepper, because that's how often it gets used around here. Blackened chicken shows up on salads, gets tucked into wraps, and lands on buns like this one more often than I'd probably admit if you asked. It's the kind of recipe my hands know by heart at this point, which is a nice way of saying I've made enough mistakes with it to know exactly what works.

Chicken thighs are the move here, not breasts. They've got more fat running through them, so they stay juicy even when the pan is screaming hot, which is exactly the kind of abuse blackening dishes out. Breasts just can't hang. They dry out fast under that heat, and a dry chicken sandwich is a sad chicken sandwich. If you need more proof that thighs deserve the hype, my Sticky Honey Garlic Chicken Thighs are a good place to see just how much flavor that cut can hold onto.

The other trick up this recipe's sleeve is the two-stage sear. Blast the heat to set that deep, dark crust, then dial it back to medium so the inside actually finishes cooking instead of scorching. That's the whole secret to blackened versus burnt. If you've ever taken a bite of blackened chicken and gotten a mouthful of bitter, ashy crust, the pan was just cranked too high for too long. Do it right, and the spices toast into something smoky and craveable instead.

What is Blackening?

Blackening is a cooking technique found in mostly Cajun cuisine that involves coating meat in a blend of spices and herbs that take on a dark brown or even black coloring when seared on a skillet or grill. Blackening seasoning is usually a combination of onion powder, paprika, garlic powder, cayenne pepper, salt and black pepper.

A lot of people mistake blackening for being burnt. But don't worry it's not!

Ingredients

Chicken thighs. Boneless, skinless chicken thighs stay juicier than breasts under the high heat this recipe needs. If you only have chicken breasts, pound them to an even thickness first and watch them closely, since they'll cook faster and dry out more easily.
Blackening seasoning. A homemade mix of garlic powder, paprika, smoked paprika, onion powder, cayenne, oregano, salt, and pepper. Store-bought Cajun or blackening seasoning works in a pinch, but homemade lets you control the salt and heat level.
Fresh thyme. Adds an earthy, slightly floral note that balances the smokiness of the paprika. Dried thyme (about ¼ teaspoon) works if that's what you have.
Olive oil. Any high smoke-point oil works here, and avocado oil is a good substitute if you have it, since it can handle the high heat without smoking excessively.
Spicy mayo. Just mayonnaise, lime juice, and hot sauce. For a milder version, cut the hot sauce in half and add a touch of honey to round it out.
Buns. Brioche or hamburger buns both work. For a lighter option, swap in lettuce wraps, since the Cajun spice really is the star here and you won't miss the bread.

See the recipe card below for the remaining ingredients and quantities.

Substitutions & Variations

This recipe also works great with chicken cutlets or chicken tenders if that's what you have. Make sure you're using similar-sized pieces to ensure an even cook.
Add your favorite garnishes like crisp pickles, red onion or havarti cheese.
For a lighter option, use lettuce wraps or your favorite bread alternative. The blend of cajun spices is truly the main event.

Instructions

Raw chicken thighs with seasoning on a cutting board.

Step 1: Add the spices to a small bowl and mix. Pat the chicken thighs dry with a paper towel. Season the chicken with spice mix on all sides.

Chicken thighs being cooked in a skillet.

Step 2: Heat a cast-iron pan over high heat. Once hot, add the olive oil and chicken and cook for 2 minutes per side. Turn the heat down and cook the chicken until cooked through.

Step 3: Make the spicy mayo while the chicken cooks.

Step 4: Serve the blackened chicken on a toasted bun with spicy mayo, lettuce and tomato. Enjoy!

Sarah's Top Tips

Get your skillet screaming hot before the chicken goes in. Preheat a cast-iron skillet over high heat until it's very hot, then add the oil. This initial blast of heat is what sets the crust in the first 2 minutes per side - if the pan isn't hot enough, the spices won't blacken, they'll just steam.
Drop the heat to medium once the crust is set. After the first sear, turn the heat down and let the chicken finish cooking through gently. This is the single biggest reason this recipe turns out blackened instead of burnt - high heat the whole way through scorches the spices before the inside is done.
Let the chicken rest for 5 minutes before slicing or building your sandwich. Cutting into it right off the skillet lets all those juices run out onto the cutting board instead of staying in the meat, and you'll end up with a drier sandwich.
Use a meat thermometer. Chicken thighs are forgiving, but pulling them at exactly 165°F guarantees a juicy result every time instead of guessing based on color alone.

Blackened chicken sandwich with spicy mayo.

Serving

The classic way to serve these is simple: a toasted brioche bun, a generous swipe of spicy mayo, crisp lettuce, and a thick slice of tomato. If you want to round out the meal, a bright, acidic side does a lot of work against the smoky heat of the chicken. My Greek Cucumber Salad has that same cool, crisp contrast that a spicy sandwich needs. For something heartier, Smashed Fingerling Potatoes bring a crispy, salty side that holds up next to the bold Cajun flavor without competing with it. Or keep it classic with Air Fried Steak Fries - you really can't go wrong pairing a spicy sandwich with a big pile of fries.

Storage & Reheating

Fridge: Store leftover blackened chicken in an airtight container in the fridge for 3-4 days. Keep the spicy mayo in a separate container so the bun and toppings don't get soggy.
Freezer: Freeze cooled, cooked chicken in a freezer-safe bag or container for 3-4 months. Lay pieces flat in the bag so they thaw evenly and quickly.
Reheating: Reheat gently in a skillet over medium-low heat for a few minutes until warmed through, or microwave for 1-2 minutes. A skillet does a better job of keeping the crust from turning soft compared to the microwave.
Make Ahead: The spice blend can be mixed up to a week in advance and stored in an airtight container, and the spicy mayo keeps well in the fridge for up to 5 days. Season the chicken up to a day ahead and keep it covered in the fridge so it's ready to sear when you want dinner on the table fast.