These Pepperoncini Grilled Chicken Sandwiches are truly next-level: tender, tangy, and creamy all at once. They’re perfect for backyard grilling, casual dinners, or anytime you want a sandwich with a bright, zesty twist.
Pepperoncinis are mildly spicy, tangy peppers often used in Italian and Mediterranean cooking. Their balancing tang and gentle heat lift salads, sandwiches, and more. One of the best parts of this recipe is the pepperoncini brine — not just the peppers themselves. The brine is a fantastic secret weapon: it adds bright acidity and helps tenderize lean chicken like breast meat, especially when used as a marinade.
Marinating boneless, skinless chicken breasts in pepperoncini brine overnight dramatically improves texture and flavor. If you don’t have time for a full day, an 8-hour marinade will still yield remarkably juicy, flavorful chicken. The acid in the brine helps break down muscle fibers while imparting that unmistakable pepperoncini tang.
Equally important is the Creamy Dijon Spread. A combination of mayonnaise, whole-grain Dijon mustard, and a splash of pepperoncini brine gives the spread a silky texture and tangy bite that complements the chicken perfectly. Slather it on a buttered, toasted brioche bun, add the grilled chicken, shredded iceberg lettuce, and a few sliced pepperoncinis, and you’ve got a sandwich that’s crisp, creamy, and full of flavor.
Ingredients:
- Boneless, skinless chicken breasts
- Pepperoncini brine
- Mayonnaise
- Whole-grain Dijon mustard
- Kosher salt
- Freshly ground black pepper
- Brioche burger buns
- Unsalted butter
- Sliced provolone cheese
- Shredded iceberg lettuce
- Sliced pepperoncini
- Whole pepperoncinis (optional for serving)
Step-by-Step:
Step One: Marinate the Chicken (8 to 24 Hours Before Serving)
Place the chicken breasts on a cutting board and cover them with parchment paper or plastic wrap. Use a meat mallet or the bottom of a heavy skillet to pound each breast to an even 1/2-inch thickness. Pat the pieces dry with paper towels, then transfer the chicken to a medium bowl. Pour enough pepperoncini brine over the chicken to just cover it. Cover and refrigerate for at least 8 hours, up to 24 hours, for best results.
Step Two: Make the Creamy Dijon Spread
In a small bowl, whisk together 1/4 cup mayonnaise, 1/4 cup whole-grain Dijon mustard, 1 tablespoon pepperoncini brine, and salt and freshly ground black pepper to taste. Adjust the brine or mustard if you prefer more tang or heat. Set the sauce aside.
Step Three: Prepare the Grill
Preheat the grill to medium-high (about 400°F). Oil the grates lightly by dipping a folded paper towel in a bit of oil and using tongs to wipe the oil across the grates. Use just a small amount of oil — too much can cause flare-ups.
Step Four: Grill the Chicken
Place the marinated chicken on the hot grill and cook for about 6 to 8 minutes without moving until golden and grill marks appear. Flip and continue cooking until the chicken is cooked through, about 5 more minutes. Top each breast with a slice of provolone and close the grill lid for 1 to 2 minutes so the cheese can melt. Transfer the chicken to a plate and let it rest for a few minutes before assembling.
Step Five: Toast the Buns
Spread softened unsalted butter on the cut sides of brioche buns and toast them in a skillet over medium heat or briefly on the grill until golden and crisp on the buttered side. Keep an eye on them — brioche browns quickly.
Step Six: Assemble and Serve
Generously spread the Creamy Dijon on both bun halves. Place a grilled chicken breast on the bottom bun, add a generous handful of shredded iceberg lettuce and several sliced pepperoncinis, then crown with the top bun. If desired, garnish each sandwich with a whole pepperoncini on a toothpick for a classic presentation. Serve immediately and enjoy.
Recipe FAQs
Yes. A cast-iron grill pan gives attractive grill marks and a good crust, but any heavy-bottomed skillet will work well for stovetop cooking.
These sandwiches pair nicely with a Greek-style pasta salad, a crunchy green salad loaded with summer vegetables, a creamy Italian pasta salad, or simply with grilled vegetables or crispy fries.
I hope you enjoy these Pepperoncini Grilled Chicken Sandwiches throughout grilling season. Leave a comment below to share how yours turned out!
Want more pepperoncini recipes? Try these!
Italian Chop Salad with Pepperoncini Vinaigrette
Philly Cheesesteak Sliders
Sileo Celery Salad
Pepperoncini Grilled Chicken Sandwiches
Ingredients
For the Chicken:
- 4 small boneless, skinless chicken breasts
- 1 cup pepperoncini brine, or more as needed
For the Creamy Dijon Spread:
- 1/4 cup mayonnaise
- 1/4 cup whole-grain Dijon mustard
- 1 tablespoon pepperoncini brine
- Kosher salt, to taste
- Freshly ground black pepper, to taste
For the Sandwiches:
- 4 brioche burger buns
- 2 tablespoons unsalted butter
- 4 slices provolone cheese
- 1/2 cup shredded iceberg lettuce
- 1/2 cup sliced pepperoncini
- 4 whole pepperoncini, optional for serving
Instructions
Marinate the Chicken (8 to 24 Hours Before Serving)
- Place chicken breasts on a cutting board and cover with parchment or plastic wrap. Pound to an even 1/2-inch thickness. Pat dry and transfer to a bowl. Pour pepperoncini brine over chicken until just covered. Refrigerate 8–24 hours.
Make the Creamy Dijon Spread
- Whisk together mayonnaise, Dijon mustard, pepperoncini brine, salt, and pepper in a small bowl. Set aside.
Prepare the Grill
- Preheat grill to medium-high (about 400°F). Oil the grates lightly using a paper towel and tongs.
Grill the Chicken
- Grill chicken 6–8 minutes until golden with grill marks, flip and cook until done, about 5 more minutes. Add cheese and close lid until melted. Rest a few minutes.
Toast the Buns
- Butter and toast buns over medium heat until golden on the buttered side. Remove and set aside.
Assemble and Serve
- Spread the Creamy Dijon on both bun halves. Add grilled chicken, shredded lettuce, and sliced pepperoncini. Top with the bun and serve. Garnish with a whole pepperoncini if desired.
Nutrition
Calories: 488 kcal, Carbohydrates: 26 g, Protein: 35 g, Fat: 27 g, Saturated Fat: 10 g, Sodium: 751 mg, Fiber: 4 g, Sugar: 5 g.
Nutrition information is automatically calculated and should be used as an approximation.
Additional Info
Author: Alex Snodgrass
Course: Main Course
Servings: 4
Calories: 488
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Food photography and styling by Eat Love Eats.