Pound the chicken breast flat to about half an inch thickness using the bottom of a heavy pan or a meat mallet. This matters because thicker chicken dries out on the grill, and I learned that lesson when hosting fifteen people and serving shoe leather. Even thickness means everything cooks at the same speed.
Mix olive oil, garlic powder, lemon juice, and black pepper in a small bowl, then rub the mixture all over both sides of the chicken. The oil creates a seal that keeps moisture locked inside during grilling, which is why skipping this step costs you tender meat. Let the chicken sit at room temperature for ten minutes so it cooks evenly.
Heat your grill to medium-high heat, around 375-400 degrees Fahrenheit, and oil the grates with a towel so the chicken releases cleanly. Watch for the chicken to develop light char marks before flipping—this takes about 5-6 minutes. Char marks mean flavor, and they're the reason grilled chicken tastes completely different from pan-seared chicken.
Flip the chicken and cook the second side for another 5-6 minutes until the internal temperature reaches 165 degrees Fahrenheit at the thickest part. Use a meat thermometer because guessing is how you end up with either undercooked chicken or the rubbery texture nobody wants. I was skeptical about this step until I actually did it and realized I'd been overcooking chicken for years.
Remove the chicken from the grill and let it rest on a cutting board for five minutes before slicing into strips. Resting redistributes the juices throughout the meat instead of having them run out onto your plate. This is why rushed shortcuts don't work—the waiting actually improves the result.
Warm the tortillas on the grill for about 30 seconds per side just until they're pliable and slightly charred, then transfer them to a clean kitchen towel to cool completely. Most people skip this step or do it unevenly, which is why their wraps tear when rolling. The cooling period also prevents the lettuce from wilting when you assemble everything.
Layer each tortilla with romaine lettuce first, then top with sliced grilled chicken, shredded parmesan, a drizzle of Caesar dressing, and croutons. The order matters because lettuce creates a barrier that protects the tortilla from getting soggy too quickly. Dressing should be applied right before eating if possible, but these grilled chicken Caesar wraps crowd can sit for up to two hours if you hold the croutons separate.