Prep the Zucchini. Grate the zucchini on the large holes of a box grater. Transfer 1/2 cup Grated Zucchini to a clean kitchen towel or a couple of paper towels and squeeze out as much of the liquid as possible. This step matters; extra water in the burgers could make them fall apart.
Make the Burger Patties. In a large bowl, combine 8 oz. Ground Turkey, 1/2 tsp. Smoked Paprika, 1/2 tsp. Garlic Powder, 1/2 tsp. Onion Powder, 1/2 tsp. Kosher Salt, 1/4 tsp. Chili Powder, 1/4 tsp. Ground Cumin, the squeezed zucchini, 1/3 cup Shredded Cheddar Cheese, 1/4 cup Panko Breadcrumbs, 1 1/2 tbsp. Whipped Cream Cheese, and 1 tsp. Worcestershire Sauce. Gently mix until everything is just combined. (Over-mixing can make the burgers tough!) Divide the mixture in half and shape into two patties, about 1/2″ thick.
Cook the Burgers. There are two options here:On the Stovetop: Heat a drizzle of olive or avocado oil in a large, nonstick pan over medium heat. Drizzle a little bit of oil onto the burger patties, then cook them for 5-6 minutes per side until cooked through to 165º F. (If needed, cover the pan with a lid towards the end of cooking to trap the heat and help them cook through without over-browning.)On the Grill: Lightly oil the grill grates, then heat the grill up to medium heat. Cook the burgers for 5-6 minutes per side until cooked through, then transfer to a plate to briefly rest before serving.
Make the Mashed Avocado Topping. In a small bowl, mash 1 medium Avocado (peeled and pitted) with a pinch of Salt, 1/4 tsp. Garlic Powder, and 1 tsp. Fresh Lime Juice until mostly smooth, with a few chunks remaining.
Serve. Toast the buns if you like, then serve the burgers on the buns with your favorite toppings! I love a quick mashed avocado and red onions, but you can really do whatever you want here!
Notes
I use 85/15 ground turkey, but a leaner option (like 90/10 or 93/7) will work! Add another tablespoon of whipped cream cheese if you're worried about it being dry.