Preheat & Prep:
Preheat oven to 350°F (175°C). Lightly grease a 9x13" baking dish.
Cook Base Ingredients:
If not already done, cook and shred chicken. Crisp and crumble bacon.
Mix the Creamy Base:
Beat softened cream cheese until smooth. Mix in sour cream and mayo until creamy. Stir in soups and slowly add broth for desired consistency.
Sauté Aromatics:
In a skillet, cook onions in olive oil until soft (3–4 mins). Add garlic, cook 30 sec. Stir into creamy base.
Flavor Boost:
Add Worcestershire, thyme, salt, pepper. Fold in two-thirds of the crumbled bacon.
Combine Chicken & Cheese:
Stir chicken into creamy mix. Add 1½ cups cheddar and ½ cup mozzarella. Spread into the baking dish.
Make the Topping:
Mix crushed crackers and melted butter. Top casserole with remaining cheddar, mozzarella, parmesan, cracker mixture, and reserved bacon.
Bake:
Bake uncovered for 30–35 minutes until golden and bubbly. Let rest for 10–15 minutes. Garnish with fresh parsley before serving.