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I make chicken fajita quesadillas when I want fajita flavor without the effort. The seasoned chicken, peppers, and onions taste like they took work, but everything cooks in one skillet and folds into a crisp, cheesy tortilla.

Stacked chicken fajita quesadilla wedges with melted cheese, peppers, and chicken on a wooden board with guacamole.
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I have made these for years, and they were always the one dinner my kids would all agree on. I cut the chicken, peppers, and onion small and all the same size, so every bite has a little of everything instead of one big strip of pepper taking over. Everyone can add or skip toppings without me building four different dinners.

This recipe came out of my two most-made Mexican dinners, my sheet pan chicken fajitas and my sheet pan quesadillas. I took the fajita filling and folded it into a crisp, cheesy quesadilla, and it has been in our regular dinner rotation ever since.

Tested & Perfected. I first published this recipe in February 2022 and retested it from scratch this year, with new photos to match. The recipe is even better now, and the change that matters most is how I season the chicken. I toss it with the fajita seasoning and let it sit before it cooks, so the flavor soaks into the meat instead of sitting on top.

The One Thing I Always Tell People

Do not wipe out the skillet between the chicken and the vegetables.

When the chicken comes out, the pan is left with browned bits and seasoning stuck to the bottom. That is real flavor, and the peppers and onions cook right in it and pick all of it up. A lot of recipes tell you to clean the pan first, and every time you do that you throw that flavor away.

Leave it, add your veggies, and let them soak up what the chicken left behind.

fajita quesadilla ingredients.

Chicken Fajita Quesadilla Ingredients

  • Fajita seasoning packet: One standard 1.4-ounce packet seasons the whole batch and keeps the flavor the same every time. If you would rather mix your own, about 3 tablespoons of a fajita or taco blend stands in for one packet. Any brand works.
  • Chicken breast: Cut it into small bite-size pieces, not strips. The smaller pieces cook fast and spread evenly through the tortilla, so no bite is all chicken or all pepper. Boneless thighs work too if you cook them all the way through.
  • Bell peppers: I use one red and one green for color and a little sweetness. Dice them about the same size as the chicken so everything folds in flat and the quesadilla cooks evenly.
  • Fiesta blend cheese: This pre-shredded mix melts smooth and holds the filling together. Layer it both against the tortilla and over the chicken so it seals the whole thing shut as it melts.
  • Burrito-size flour tortillas: Go with the large burrito size so there is room to fold without the filling spilling out. Smaller tortillas work if you want to stretch the recipe further.
Hand lifting a cheesy chicken fajita quesadilla wedge with melted cheese stretching, served with salsa, guacamole, and shredded cheese.

How to Make Chicken Fajita Quesadillas

Step 1: Season the Chicken Add the bite-size chicken to a bowl and toss it with the fajita seasoning packet and 2 tablespoons of olive oil. Set it aside while the pan heats so the seasoning soaks in.

Step 2: Cook the Chicken Heat 2 tablespoons of olive oil in a 10 to 12 inch nonstick skillet over medium-high heat. Add the chicken and cook until it is no longer pink, about 6 to 8 minutes, then move it to a bowl.Diced seasoned chicken cooking in a skillet for fajita quesadillas.

Step 3: Cook the Veggies Add the diced peppers and onion to the same skillet without wiping it out. Cook until the onion turns soft and clear and the peppers soften.Diced red and green bell peppers and onions sautéing in a skillet.

Step 4: Combine the Filling Add the chicken back to the skillet and stir it together with the vegetables. Once it is warmed through, move the whole filling back to the bowl.Cooked chicken mixed with sautéed bell peppers and onions in a skillet.

Step 5: Build the Quesadilla Lower the heat to medium and add the last tablespoon of olive oil. Lay one tortilla in the skillet, sprinkle 3/4 cup cheese over half, and top with a quarter of the filling. Fold the empty half over.Hand folding a tortilla over cheese and chicken fajita filling in a skillet.

Step 6: Cook Until Golden Cook until the bottom is golden brown, then flip and brown the other side, about 1 to 3 minutes per side. Repeat with the remaining three tortillas.Golden brown folded chicken fajita quesadilla cooking in a skillet.

Step 7: Slice and Serve Move each quesadilla to a cutting board and cut it into triangles with a knife or a pizza cutter. Serve them hot.

Hand lifting the top of a chicken fajita quesadilla to reveal melted cheese, chicken, and peppers.

How to Keep Them Crisp

Cook the liquid out of the veggies. Peppers and onions let off water as they cook. If you build the quesadilla while the filling is still wet, the tortilla steams and goes soggy. Let the filling cook until the pan looks dry, not watery.

Do not overfill. A quarter of the filling per tortilla is plenty. Pack it too full and the cheese cannot seal the edges, so it splits open and leaks when you flip it.

Stay at medium heat. Too hot and the tortilla browns before the cheese melts. Medium gives the cheese time to melt all the way through while the outside crisps.

Chicken fajita quesadilla cut into wedges on a black plate, topped with salsa and sour cream, served with shredded cheese, guacamole, and sour cream.

Easy Ways to Switch It Up

  • Change the peppers. Any color bell pepper works in place of the red and green. Yellow and orange are a little sweeter if that is what you have on hand.
  • Swap the cheese. Shredded cheddar, colby jack, pepper jack, or chihuahua all melt well here if you want something other than the fiesta blend.
  • Add heat. Stir some diced jalapeño into the filling, or use a spicy fajita seasoning if you like it hot.
Chicken fajita quesadilla wedges with melted cheese and peppers on a wooden board, served with salsa, guacamole, and sour cream.

What I Serve With Them

I set these out with bowls of sour cream and salsa so everyone can dip. My easy guacamole and a batch of homemade salsa are what I reach for, and fresh pico or a squeeze of lime works too.

How to Store and Reheat

Store leftovers in an airtight container in the fridge for up to 3 days. I make the chicken and veggie filling ahead sometimes and keep it in the fridge, then cook the quesadillas fresh when we are ready to eat. To reheat a cooked one, warm it in a dry skillet over medium until the cheese melts again and the outside crisps back up.

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5 from 2 votes
Stacked chicken fajita quesadilla wedges with melted cheese and peppers on a wooden board next to a bowl of guacamole.

Chicken Fajita Quesadilla

Serves — 4
Chicken fajita quesadillas pack seasoned chicken, peppers, onions, and fiesta blend cheese into crisp tortillas. I cut everything bite-size so every piece has a little of everything.
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes

Ingredients
 

  • pounds boneless, skinless chicken breast cut into small bite size pieces
  • 1.4 ounce packet fajita seasoning
  • 5 tablespoons extra virgin olive oil (Divide 2 tablespoons for seasoning, 2 tablespoons cooking chicken breast and veggies, 1 tablespoon for tortilla shells)
  • 1 red bell pepper washed, dried, deseeded and diced
  • 1 green bell pepper washed, dried and deseeded and diced
  • 1 cup finely chopped yellow onion
  • 4 large burrito size flour tortillas
  • 3 cups shredded fiesta blend cheese

Instructions
 

  • Add the chicken to a medium size bowl.
    1½ pounds boneless, skinless chicken breast
  • Use tongs to toss the chicken breast, fajita seasoning and 2 tablespoons extra virgin olive oil. Set it aside.
    1.4 ounce packet fajita seasoning, 2 tablespoons extra virgin olive oil
  • Add 2 tablespoons of olive oil to a 10 to 12 inch nonstick skillet over medium high heat.
    2 tablespoons extra virgin olive oil
  • Saute the seasoned chicken breast until cooked through and no longer pink, about 6 to 8 minutes. Transfer to a heat proof bowl.
  • Add the diced bell peppers and onion to the skillet and cook until the onion is opaque and the bell peppers are softened.
    1 red bell pepper, 1 green bell pepper, 1 cup finely chopped yellow onion
  • Re-add the cooked chicken and stir to combine. Once warmed, transfer back to the heat proof bowl.
  • Lower the temperature to medium, and add the remaining 1 tablespoon of olive oil to the skillet.
    1 tablespoons extra virgin olive oil
  • Next place 1 tortilla to the skillet.
    4 large burrito size flour tortillas
  • Sprinkle ¾ cup shredded fiesta blend cheese to half of the tortilla.
    2.25 cups shredded fiesta blend cheese
  • Top the cheese with ¼ of the chicken and vegetable mixture.
    0.75 cups shredded fiesta blend cheese
  • Fold the other half of the tortilla over the chicken and vegetables.
  • Cook the tortilla until the bottom of the tortilla is golden brown, then flip over to brown the other side of the tortilla, about 1 to 3 minutes per side. Repeat the process for the remaining 3 tortillas.
  • Transfer to a cutting board, and using a large kitchen knife, or pizza cutter to slice the quesadillas into 3 triangles. (You can also slice into 4 pieces) Serve while hot.

Jenn’s Notes

Storage:
Leftovers keep in an airtight container in the fridge for up to 3 days. If you want to get ahead, the chicken and veggie filling can be made in advance and stored in the fridge until you’re ready, then just cook the quesadillas fresh when it’s time to eat. To reheat a cooked quesadilla, warm it in a dry skillet over medium heat until the cheese melts back through and the outside crisps up again.
Tips:
  • Cook the moisture out of the vegetables before you build anything. Peppers and onions release a lot of water as they cook, and a wet filling means a soggy tortilla. Keep cooking until the pan looks dry, not watery, before you even think about assembling.
  • Less filling than you think. A quarter of the filling per tortilla is all you need. Overstuffing prevents the cheese from sealing the edges properly, and the whole thing splits open and leaks the moment you try to flip it.
  • Keep the heat at medium and leave it there. High heat browns the tortilla before the cheese has a chance to melt all the way through. Medium gives everything time to come together, a crispy outside and fully melted cheese all the way to the edges.

Nutrition Info

Calories: 842kcal | Carbohydrates: 31g | Protein: 60g | Fat: 54g | Saturated Fat: 21g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 21g | Trans Fat: 0.02g | Cholesterol: 194mg | Sodium: 979mg | Potassium: 1031mg | Fiber: 7g | Sugar: 5g | Vitamin A: 2111IU | Vitamin C: 67mg | Calcium: 824mg | Iron: 6mg

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