Easy Dump-and-Bake Chicken Alfredo Broccoli Pasta Step-by-step instructions

Before you start

Before beginning the assembly, gather all necessary ingredients and prep the fresh components. Cut the raw chicken breasts into uniform half-inch cubes to ensure they cook evenly and thoroughly. Wash the broccoli and cut it into small, bite-sized florets, ensuring they are completely dry before adding them to the dish.

Preheat the oven to 400°F (204°C) and generously coat a thirteen-by-nine-inch baking dish with nonstick cooking spray or a light layer of olive oil. Measure out the uncooked pasta, Alfredo sauce, chicken broth, and cheeses so everything is ready to be layered.

Instructions

Assembling the Casserole Base

1. 1Prepare the Base
   Preheat the oven to 400°F (204°C). Lightly grease a 9x13-inch baking dish with nonstick cooking spray or olive oil. Add the uncooked penne pasta, cubed raw chicken breast, and bite-sized broccoli florets directly to the prepared baking dish.
   Look for Ensure the ingredients are evenly distributed across the bottom of the dish.
   Tip Cut the chicken into uniform 1/2-inch pieces so it cooks completely at the same rate as the pasta.

At the end of this initial assembly phase, the baking dish should contain an even layer of uncooked penne, cubed raw chicken, and green broccoli florets. The raw poultry must be handled with care, ensuring it does not come into contact with any ready-to-eat surfaces. The dish is now ready for the liquid components, which will hydrate the dry pasta and poach the chicken during the baking process.

Baking and Hydrating the Pasta

2. 2Add Liquids and Seal
   Pour the jarred Alfredo sauce and chicken broth over the ingredients. Stir thoroughly with a mixing spoon to combine, ensuring that all of the dry pasta is completely submerged in the liquid. Cover the baking dish tightly with aluminum foil, crimping the edges securely.
   Look for The foil must form a tight seal to trap the steam inside.
   Tip A tight seal is crucial; if steam escapes, the pasta will remain hard and uncooked.
3. 3Bake the Casserole
   Place the covered baking dish in the preheated oven and bake for 35 minutes, allowing the pasta to absorb the liquid and cook through.
   Look for The dish should feel hot and heavy when carefully removed from the oven.
   Tip Keep the oven door closed during baking to maintain a constant temperature.

After the covered baking period, carefully peel back the aluminum foil, keeping your face away from the escaping hot steam. The pasta should be tender but still have a slight bite, having absorbed most of the liquid.

The Alfredo sauce will appear bubbling, rich, and slightly thickened by the pasta starches. The chicken pieces should look opaque and cooked through. Give the mixture a gentle stir to redistribute the sauce before adding the cheese topping.

Melting the Cheese and Broiling

4. 4Add Cheese Topping
   Carefully remove the aluminum foil, watching out for hot steam. Stir the pasta gently, then scatter the shredded mozzarella cheese evenly over the top of the casserole.
   Look for The cheese should completely cover the pasta and broccoli.
   Tip Use freshly shredded mozzarella from a block for the best melt and cheese pull.
5. 5Broil and Check Temperature
   Return the dish to the oven uncovered. Bake or broil on high for 3 to 5 minutes until the mozzarella is melted, bubbly, and golden brown. Ensure the chicken has reached a safe internal temperature of 165°F (74°C) using a meat thermometer. Let the casserole rest for 5 minutes before serving.
   Look for Look for a bubbly, golden-brown cheese crust and steam rising from the center.
   Safe temperature 165°F (74°C) internal temperature (poultry)
   Tip Letting the casserole rest allows the sauce to thicken and settle.

At the completion of the broiling phase, the top of the casserole should be covered in a blanket of melted mozzarella cheese that is deeply golden brown and bubbling intensely. You will hear a satisfying sizzle and pop from the hot cheese. A meat thermometer inserted into the thickest pieces of chicken must register at least 165°F (74°C). Let the dish rest briefly to allow the sauce to set before serving.

Common mistakes

One common mistake is failing to seal the baking dish tightly with aluminum foil. If steam escapes during the first bake, the pasta will remain hard and chalky, and the chicken will dry out. Ensure the foil is crimped securely around the entire rim of the dish.

Another error is omitting the chicken broth; the Alfredo sauce alone does not contain enough free water to hydrate the dry pasta. Lastly, avoid overcrowding the dish with too much broccoli or chicken, which can lower the oven temperature and lead to uneven cooking.

How to tell it’s done

To determine if the casserole is fully cooked, insert a digital food thermometer into several pieces of chicken in the center of the dish; the poultry must reach a safe internal temperature of 165°F (74°C) to be safe for consumption.

Additionally, test a piece of penne from the center of the baking dish to ensure it is tender and fully cooked. The mozzarella cheese on top should be completely melted, bubbly, and speckled with golden-brown spots, indicating it is ready to be removed from the oven.

• Poultry: 165°F (74°C) in the thickest part