El Pollo Loco’s chicken has that deep citrusy kick, and it all comes down to the marinade.Orange juice is the key. It doesn’t just add sweetness—it helps break down the meat so the flavors get all the way inside.I always use fresh garlic instead of powder because it gives the marinade a stronger punch that really sticks to the chicken.Let it sit in the fridge for at least six hours. Anything less, and you’re not getting the full effect of that zesty, smoky combo.Grill over medium heat and let the edges char just a bit.