Preheat the oven to 375°F and grease a 9 by 13-inch baking dish.
Cook the pasta according to package directions until al dente, reducing time by 1 minute. Drain and set aside.
Season the chicken pieces with salt, pepper, paprika, and garlic powder.
Cooking
In a large skillet over medium-high heat, melt 1 tbsp butter and brown the chicken in batches, about 3 to 4 minutes. Remove and set aside.
In the same skillet, melt the remaining 2 tbsp butter, whisk in the flour and cook for 1 minute.
Slowly add the milk and chicken broth to the skillet, whisking until smooth.
Stir in Dijon mustard, garlic powder, onion powder, and half the cheddar and mozzarella. Cook until the cheese melts and the sauce thickens, about 3 minutes.
Assembly and Baking
Combine cooked pasta, browned chicken, and cheese sauce in the greased baking dish, stirring until evenly coated.
Sprinkle remaining cheeses on top, mix breadcrumbs with 1 tbsp melted butter, and sprinkle over the top.
Bake uncovered for 20 to 25 minutes until the top is bubbly and golden. Let rest 5 minutes before serving.
Garnish with parsley and serve warm.
Notes
This dish makes great leftovers. Store in an airtight container in the fridge for up to 4 days. It can be frozen for up to 3 months.
Calories: 570kcal
Course: Dinner, Main Course
Cuisine: American
Keyword: Baked Pasta, Cheesy Recipes, Chicken Mac and Cheese, Comfort Food, Family Dinner