In a small bowl, peel and pit the avocados. Mash them until creamy. Stir in 1/4 cup of cilantro, garlic, jalapeño, lime juice, a pinch of cayenne and salt and black pepper to taste. Stir to combine, cover tightly with plastic wrap and place in the fridge while you prepare your chicken burgers.
In a large bowl, add the ground chicken, remaining 1/4 cup of chopped cilantro, garlic powder, onion powder, smoked paprika, chili powder, ground cumin and a generous amount of salt and black pepper. Stir until thoroughly combine, and then form the chicken into 4 equal-sized patties. Cover with plastic wrap and place in the fridge for 10 minutes.
Spray the burgers heavily with a nonstick spray and wipe the grill grates of your grill with oil. Preheat your grill over medium-high heat. Place your chicken burgers directly on the grill grates and grill for about 7 minutes on each side or until fully-cooked. Use a meat thermometer for accuracy. Remove from heat and allow to rest for about 5 minutes.
Place a layer of guacamole on each bun bottom. Place the patty on top and then add additional toppings if you wish (mayo, sour cream, lettuce, etc). Serve the grilled chicken burgers immediately with french fries or a side salad. Enjoy!