The Ultimate Grilled Chicken Sandwich is the one summer meal I make on repeat – juicy grilled chicken breasts stacked on crisp lettuce and tomatoes, oozy cheddar, and smoky grilled onions, all tucked into a pillowy toasted bun. Each bite combines zesty pesto mayo, tender chicken, melty cheese, and pops of bright, garden-fresh veggies in a way that feels restaurant-worthy but totally achievable at home. If you’re looking for a sandwich that balances rich flavor, a hint of smokiness, and that irresistible crunch with every bite, you’re about to discover your new cookout favorite!

Ultimate Grilled Chicken Sandwich Recipe - Recipe Image

Ingredients You’ll Need

Every ingredient in this Ultimate Grilled Chicken Sandwich has a job to do – from marinated chicken that soaks up flavor, to fresh, vibrant toppings that add color and crunch. Here’s what you’ll need to capture that unforgettable taste at home:

Boneless, skinless chicken breasts: The star of the show – butterfly for even grilling and maximum juiciness.
Olive oil: Helps the marinade cling to the chicken and infuses rich flavor.
Reduced-sodium soy sauce: Brings savory depth and seasons the chicken perfectly.
Apple cider vinegar: Adds a gentle tang that tenderizes the meat beautifully.
Garlic powder: For that nostalgic, mouthwatering garlic undertone in each bite.
Ground ginger: A secret twist that gives the marinade a subtle warmth.
Kosher salt and freshly ground black pepper: Essential for rounding out the chicken’s flavor.
Grilling seasonings of choice: Customize to your taste – try smoked paprika, chili powder, or a BBQ blend.
Mayonnaise (with olive oil): Acts as the creamy base for the pesto mayo that takes this sandwich over the top.
Basil pesto sauce: Brings that pungent, herby zing that makes the spread unforgettable.
Lemon juice: A bright note in the pesto mayo to balance the richness.
Red onions, sliced thick: Grill until sweet and caramelized for maximum flavor.
Cheddar cheese slices: Melts wonderfully onto the hot chicken – classic and comforting.
Hamburger buns: Toast on the grill for smoky flavor and to ensure they’re sturdy enough to hold all the layers.
Lettuce and tomato slices: Provide crunch, freshness, and a pop of color to every sandwich.

How to Make Ultimate Grilled Chicken Sandwich

Step 1: Butterfly and Prep the Chicken

Start by carefully butterflying your chicken breasts for even cooking; you want each piece to grill quickly but stay juicy. If your chicken pieces are large, trim or stack as needed – the key is size consistency for even grilling. Pat the chicken dry so it will absorb all the flavors from your marinade.

Step 2: Marinate the Chicken

Pop the chicken breasts into a large ziplock bag. In a mixing bowl, whisk together olive oil, reduced-sodium soy sauce, apple cider vinegar, garlic powder, ground ginger, salt, and pepper. Pour this savory marinade over the chicken, seal the bag, and massage the marinade into every nook and cranny. Let this bathe in the fridge for at least 30 minutes, but an hour is even better and will deliver that extra depth of flavor that makes this the Ultimate Grilled Chicken Sandwich.

Step 3: Make the Pesto Mayo

While the chicken soaks up flavor, stir together mayonnaise, basil pesto, and a squeeze of lemon juice in a small bowl. The pesto mayo brings creamy, herby brightness that truly sets this sandwich apart. Cover and refrigerate until it’s assembly time.

Step 4: Preheat and Prep Your Grill

Get your outdoor grill blazing to about 375°F. The right temperature means the chicken will sear beautifully but stay juicy inside. Take the chicken out of the fridge so it starts to shake off the chill. This step helps the meat cook evenly once it hits the grates.

Step 5: Grill the Chicken and Melt the Cheese

Place the butterflied chicken onto the hot grill, sprinkle with your favorite grilling spices, and let the sizzle happen. Cook on one side for around 6-7 minutes, flip, and cook through, adding a slice of cheddar cheese during the final minute so it melts luxuriously over the chicken. Remember, pull the chicken off at about 160°F, then let it rest – it’ll reach that perfect 165°F while the juices redistribute.

Step 6: Grill the Buns and Onions

Reduce the heat on your grill and lay out the sliced red onions and hamburger buns, cut side down. Grill the onions until they’re soft and caramelized, and toast the buns to golden perfection. The grill marks add a touch of smokiness that you’ll notice in every bite.

Step 7: Assemble the Sandwiches

Here’s where the magic happens: generously spread pesto mayo onto the toasted bottom bun, add a layer of lettuce and ripe tomato, place the cheesy grilled chicken on top, then scatter grilled onions before capping the masterpiece with the top bun. Each layer brings its own texture and flavor to this Ultimate Grilled Chicken Sandwich!

Step 8: Serve and Savor

Plate up your sandwiches while they’re fresh and melty. Dive in alongside your favorite summer sides and watch as everyone comes back for seconds – these won’t last long!

How to Serve Ultimate Grilled Chicken Sandwich

Garnishes

For an extra pop of flavor and presentation, garnish your sandwich with a sprinkle of freshly chopped basil or parsley. A few thinly sliced pickled onions or a drizzle of balsamic glaze can also add color and a gourmet touch. If you’re feeling adventurous, a little crushed red pepper or even a few microgreens make your Ultimate Grilled Chicken Sandwich feel straight from a bistro.

Side Dishes

Pair your sandwich with easy, crowd-pleasing sides like sweet potato fries, crunchy coleslaw, or corn on the cob. A light summer pasta salad or kettle chips are also fantastic options. The idea is to keep your sides bright and crisp to complement the sandwich’s smoky, savory notes – these combos turn a simple lunch into a picnic-worthy feast!

Creative Ways to Present

Stack your Ultimate Grilled Chicken Sandwich high on a wooden board with a paper wrap and a big pickle spear for a deli-inspired look. Or, cut each sandwich in half and arrange with colorful toothpicks for a party platter. For backyard BBQs, set out a build-your-own sandwich bar with all the toppings and let everyone make theirs just the way they like.

Make Ahead and Storage

Storing Leftovers

If you want to enjoy another Ultimate Grilled Chicken Sandwich later in the week, simply store the grilled chicken, grilled onions, and pesto mayo separately in airtight containers in the refrigerator. Assemble your sandwich with fresh lettuce and tomato just before eating to ensure every bite stays crisp and flavorful.

Freezing

You can freeze grilled chicken breasts for up to three months. Let them cool completely, then wrap tightly in foil or plastic wrap before sealing in a freezer bag. While the pesto mayo and veggies don’t freeze well, you can whip up fresh toppings in just minutes once you’re ready to reheat.

Reheating

To reheat your chicken, let it thaw overnight in the fridge if frozen, then warm gently in a skillet over medium heat or on the grill until hot and juicy. Add a fresh slice of cheddar during the last minute or two for that just-melted finish. Avoid microwaving buns or veggies, as they can get soggy – always toast new buns for best results.

FAQs

How do I prevent the chicken from drying out on the grill?

Butterflying the chicken and using a flavorful marinade go a long way to keeping it juicy! Grill over medium heat and pull the chicken off just shy of done – resting it will let the temperature rise the last few degrees for perfect, moist results every time.

Can I use chicken thighs instead of breasts for the Ultimate Grilled Chicken Sandwich?

Absolutely! Chicken thighs add extra juiciness and rich flavor. Just keep in mind they might need a minute or two more on the grill. Watch for that magic 165°F internal temperature and rest before serving.

What’s the best cheese for this sandwich?

Cheddar is a classic choice for its meltiness and tang, but feel free to try provolone, Swiss, pepper jack, or even mozzarella if you’d like to switch it up! The Ultimate Grilled Chicken Sandwich is adaptable to your favorite flavors.

How can I make this sandwich gluten-free?

Opt for gluten-free buns (there are some fantastic ones on the market!), and double-check your soy sauce or swap for tamari. All the other ingredients are naturally gluten-free, so adapting this recipe is a snap.

Can I grill the chicken ahead of time?

Yes! You can grill the chicken up to 2 days in advance. Store it chilled and reheat gently on the grill or stovetop before assembling. Keep the pesto mayo and vegetables fresh until serving for the best Ultimate Grilled Chicken Sandwich experience.

Final Thoughts

Whether you’re feeding a weekend crowd or looking to level up your family’s weeknight dinner, making the Ultimate Grilled Chicken Sandwich couldn’t be more rewarding – or delicious. Get creative with toppings, set up a sandwich bar, or just pour a cold drink and dig in. Your backyard barbecue just found its new headliner!