In a large bowl, combine the ground chicken, chopped spinach, shredded white cheddar cheese, breadcrumbs, finely chopped onion, minced garlic, Dijon mustard, Worcestershire sauce, salt, and black pepper. Use your hands or a spatula to gently mix the ingredients until just combined, being careful not to overwork the chicken, which keeps the burgers tender and juicy.

Divide the mixture into four equal portions, shaping each portion into a firm patty about ¾ inch thick. Make a slight indentation in the center of each patty; this will help them cook evenly without puffing up. Set the patties aside on a plate while you prepare to cook, ensuring they maintain their shape.

Heat a large skillet over medium heat and drizzle with olive oil, allowing it to get hot but not smoking. Carefully add the patties to the skillet, cooking for 5-6 minutes on each side. Use a meat thermometer to check for doneness, ensuring the internal temperature reaches 165°F (75°C) for safe consumption.

Once the patties are cooked through and golden brown, transfer them to a plate and let them rest for a few minutes. This step allows the juices to redistribute, ensuring your White Cheddar and Spinach Chicken Burgers remain moist and flavorful. Meanwhile, prepare your burger buns and any desired toppings.

Place each juicy patty onto a burger bun, and add your favorite toppings such as fresh lettuce, sliced tomatoes, or extra cheese. Serve with healthy sides like sweet potato fries or a crisp salad for a complete meal. Dive into these delightful White Cheddar and Spinach Chicken Burgers that are perfect for any gathering!