Chicken is something we fall in and out of love with, but when the craving hits, we want damn good chicken. And, we forget how simple and delicious it can be, until we go back to easy recipes like this grilled chicken sandwich, where the chicken stays juicy to the last bite. Great bread, homemade spicy mayo, and this is the one that makes us question why we don’t cook chicken more often.
Dry chicken is the enemy, and we’ve been in a long war with it at the GC Meat Labs. The fix is less mysterious than most recipes make it: pound the breasts to an even ¾-inch, so every part of the cutlet finishes at the same time, let the lemon-Dijon marinade work for at least 15 minutes, pull it off the grill at 165°F, and then rest it three minutes before the chicken touches the bread.
We make this on sourdough when we want the full sandwich and in lettuce wraps on the days when it’s too hot for bread to sound like a good idea. Either way, with that spicy mayo and a fresh avocado, this is our go-to chicken sandwich all summer long.
🔪 Ingredients for Grilled Chicken Sandwich
For the Chicken
- Boneless, skinless chicken breasts: Sliced into cutlets horizontally, then pounded to a consistent thickness. This gives you four even pieces that cook fast and don’t dry out at the edges before the center is done.
- Olive oil
- Fresh lemon juice: Fresh matters here, especially with a short marinade window. Bottled lacks the brightness.
- Dijon mustard: Acts as the emulsifier that holds the marinade together and adds a gentle, tangy backbone.
- Garlic powder
- Paprika
- Italian seasoning, salt, black pepper
For the Spicy Mayo
- Mayonnaise
- Sriracha sauce: Start with 1½ tablespoons and adjust up or down from there.
- Lemon juice: A small amount keeps the sauce from tasting flat.
- Honey: Balances the heat. Don’t skip it.
- Water: To help loosen, if needed
For Serving
- Sourdough bread: The slight tang plays off the sriracha mayo, and it’s sturdy enough to hold up on the grill without falling apart.
- Lettuce, sliced tomato, sliced red onion, pickles, avocado: All optional. Build to your preference.
📝 How to Make Grilled Chicken Sandwich
- Prep the chicken. Lay each breast flat on a cutting board and slice horizontally into two cutlets. Pound to an even thickness of about ¾ inch. Uneven chicken means one end overcooks while the thick end is still underdone.
- Make the marinade. Whisk together olive oil, lemon juice, Dijon, garlic powder, paprika, Italian seasoning, salt, and pepper in a bowl. Add the chicken, turn to coat, and marinate for 15–30 minutes at room temperature or up to 2 hours in the fridge.
- Make the spicy mayo. Stir together mayo, sriracha, lemon juice, honey, salt, and a splash of water until the sauce is loose enough to spread easily. Refrigerate until ready to use. This keeps up to a week.
- Preheat the grill. Heat to medium-high, around 400–425°F at the grate. Oil the grates well – chicken sticks when grates are cold or dry, and you’ll lose the crust you’re building.
- Grill the chicken. Pull the chicken from the marinade and shake off the excess. Place on the grill and leave it alone. Grill for 4–6 minutes per side until the internal temp reads 165°F. Don’t force it — if the chicken won’t release cleanly, it’s not ready. Give it another 30–60 seconds and try again.
- Rest and toast. Transfer chicken to a cutting board and rest for 3 minutes. While it rests, lay sourdough slices directly on the grill grates for 30–60 seconds per side until lightly charred with grill marks.
- Build the sandwich. Spread spicy mayo generously on both slices of bread — it acts as a moisture barrier, not just a condiment. Layer lettuce on the bottom, add the grilled chicken, then tomato, red onion, pickles, and avocado. Serve immediately.
🔄 Substitutions
- Chicken thighs for breasts: Boneless thighs are juicier and more forgiving if you go slightly over temp. Grill 5–7 minutes per side and pull at the same 165°F internal, though we’ve been known to take thighs all the way to 170°.
- Brioche bun or ciabatta for sourdough: Brioche is sweeter and softer; ciabatta is chewier. Both hold up well on the grill. Avoid soft sandwich bread – this one is begging for something better than that.
- Greek yogurt for mayo in the sauce: Tangier, lower fat, and you’ll need less water to thin it. Loses some richness but still works.
- Yellow mustard for Dijon: The swap works but you’ll notice a flatter, less complex flavor in the marinade.
- Hot sauce or chipotle in adobo for sriracha: Hot sauce keeps the heat profile similar. Chipotle adds smokiness and more heat — use about half as much.
- Lime juice for lemon: Works in both the marinade and the sauce without a major flavor shift.
💡 Meat Nerd Tips
- Pound for evenness, not thinness. You’re not making a schnitzel. The goal is a consistent ¾-inch thickness so the whole cutlet finishes at the same time on the grill. Too thin, and it dries out before you get any color on the exterior.
- The marinade window matters. Under 15 minutes, and the lemon doesn’t penetrate. Over 2 hours and the acid starts denaturing the proteins on the surface, giving you a slightly soft, mushy texture when cooked. The 15–45 minute range hits the sweet spot for most schedules.
- Let the grill release the chicken. Resist the urge to move it for the first 4 minutes. Chicken sticks until the crust forms, then releases cleanly on its own. If you’re fighting it, the crust isn’t set; wait another 30–60 seconds.
- Sauce both sides of the bread. More than flavor, the mayo creates a barrier between the bread and the juices from the chicken and toppings. It’s the difference between a sandwich that holds together and one where the bread falls apart by the second bite.
🍽️ What to Serve with Grilled Chicken Sandwiches
- A sharp, creamy coleslaw cuts through the richness of the mayo and holds up next to grilled food without wilting. Keep it cold until everything else is ready.
- Grilled corn on the cob, a quick pasta salad, or potato chips if you’re keeping it simple.
- If you’re looking for other great sandwich options, Air Fryer BBQ Chicken or Baked BBQ Chicken make solid choices.
🧊 Leftovers and Storage
- Store grilled chicken and toppings separately; assembled sandwiches go soggy.
- Grilled chicken keeps 3–4 days refrigerated in an airtight container.
- Reheat chicken in a skillet over medium heat with a splash of water, covered, for about 2–3 minutes. The microwave works at 50% power if you’re in a hurry. Full-blast reheating makes it rubbery.
- Spicy mayo keeps up to 1 week refrigerated.
- Grilled chicken freezes up to 2 months. Thaw overnight in the fridge before reheating.
Have you tried this recipe? Do us a favor and rate the recipe card with the ⭐ ⭐ ⭐ ⭐ ⭐ and drop a comment to help out the next reader.
You’re already thinking about what’s for dinner. This is it. Juicy grilled chicken, creamy avocado, and a quick homemade spicy mayo you’ll want on everything – all stacked on charred sourdough. Yeah, you need this tonight.
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Marinate
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Whisk olive oil, lemon juice, Dijon, garlic powder, paprika, Italian seasoning, salt, and pepper. Coat chicken and marinate 15–30 minutes at room temp, or up to 2 hours refrigerated.
Make the Spicy Mayo
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Stir together mayo, sriracha, lemon juice, honey, salt, and water until smooth and loose. Refrigerate until ready to use.
Preheat and Oil the Grill
Grill the Chicken
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Shake excess marinade off chicken. Grill 4–6 minutes per side until internal temperature reads 165°F and chicken releases cleanly from the grates.
Pro tip: The chicken is ready to flip when it releases cleanly from the grates. If you have to force it, give it another 30–60 seconds. Tearing the crust means losing the best part of the cook.
Assemble
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Spread spicy mayo on both bread slices. Layer lettuce, grilled chicken, tomato, red onion, pickles, and avocado. Serve immediately.
- Pound cutlets to ¾-inch thickness for even cooking. Too thin = dry before color develops.
- Don’t skip the 3-minute rest. It changes the texture noticeably.
- Spicy mayo keeps 1 week refrigerated.
- For a spicy option, add hot sauce or chipotle powder to the sauce.
- To make-ahead, mix sauce up to 3 days ahead; marinate chicken for 8 hours.
Serving: 1serving | Calories: 2861kcal | Carbohydrates: 474g | Protein: 123g | Fat: 53g | Saturated Fat: 10g | Polyunsaturated Fat: 22g | Monounsaturated Fat: 14g | Trans Fat: 0.1g | Cholesterol: 84mg | Sodium: 6503mg | Potassium: 1536mg | Fiber: 21g | Sugar: 44g | Vitamin A: 319IU | Vitamin C: 8mg | Calcium: 493mg | Iron: 36mg
Quick Summary
A lemon-Dijon marinated grilled chicken sandwich with sriracha honey mayo on toasted sourdough. Pound the cutlets to an even ¾-inch thickness, grill at medium-high to 165°F, and rest three minutes before building. The spicy mayo is what makes it worth making.
❓ FAQs
Pound the cutlets to an even ¾-inch thickness so everything finishes at the same time. Pull at exactly 165°F and rest for 3 minutes before building. Overcooking is the culprit, not the cut itself.
Yes, and boneless thighs are more forgiving. They stay juicy even if you go slightly over temp. Grill 5–7 minutes per side, depending on thickness, same 165°F target. You can use this same marinade with other chicken recipes, too.
Store chicken and toppings separately in the fridge – assembled sandwiches don’t hold well. Chicken keeps 3–4 days and reheats best in a covered skillet with a splash of water over medium heat, about 2–3 minutes.