Dinner · Part 2 of 3: Instructions
Easy Slow Cooker Chicken Penne Mozzarella Bake Step-by-step instructions

- Prep
- Cook
- Total
- Serves
- 4
Before you start
Before beginning, ensure your slow cooker is clean and placed on a stable, heat-resistant surface near an electrical outlet. Prepare your ingredients by dicing the chicken breasts into uniform, bite-sized pieces to ensure they cook evenly.
Measure out your pasta, dried herbs, and tomato coulis so they are ready for assembly. Have your cheese shredded and ready to go; you will need it for the final stage of the cooking process. Verify that your slow cooker lid fits securely to trap the necessary moisture for cooking the pasta.
Ingredients at a glance (5)
- 1 lb boneless skinless chicken breast, diced
- 12 oz uncooked penne pasta
- 1 tbsp dried Italian herbs
- 2 cups tomato coulis
- 1 cup shredded mozzarella cheese
Instructions
Layering the Ingredients
- Prepare the BasePlace the diced chicken breast into the bottom of your slow cooker. Ensure the chicken is spread in an even layer to promote consistent cooking throughout the process.Look for Chicken should be evenly distributed at the bottom.Tip Keep the chicken pieces roughly the same size for even cooking.
- Add Pasta and AromaticsScatter the dry, uncooked penne pasta over the chicken. Sprinkle the dried Italian herbs evenly across the top of the pasta to ensure balanced seasoning throughout the dish.Look for Pasta is covering the chicken layer.Tip Spread the pasta evenly rather than piling it in one spot.
At the end of this phase, the raw chicken should be uniformly distributed at the base of the slow cooker, with the dry pasta and herbs layered evenly on top. Ensure that the ingredients are not packed too tightly, allowing space for the sauce to circulate. The preparation should look organized, with the dry ingredients forming a clean layer ready to receive the tomato coulis. Verify that you have not missed any of the seasoning steps before moving on to the cooking stage.
Slow Cooking
- Add Sauce and CookPour the tomato coulis over the pasta and chicken. Secure the lid on the slow cooker and set it to cook on high for approximately 4 hours, or until the chicken is fully cooked.Look for Liquid should partially cover the pasta mixture.Safe temperature 165°F (74°C) internal temperature (poultry)Tip Ensure the pasta is submerged in the sauce for proper hydration.
During the cooking phase, the slow cooker will release a rich, savory aroma as the chicken juices and herbs infuse into the tomato coulis. You should observe the liquid bubbling gently. By the end of this phase, the pasta should have absorbed most of the liquid and reached a tender texture.
The chicken will be fully cooked through, tender, and succulent. Check that the pasta is cooked through by testing a piece near the center of the cooker before proceeding to the cheese addition.
Melting the Cheese
- Finish with CheeseOpen the lid and sprinkle the shredded mozzarella cheese over the top of the hot pasta. Cover again for 5 to 10 minutes until the cheese is melted and bubbling.Look for Cheese is melted and bubbly.Tip Gently stir the pasta slightly before adding cheese if necessary.
In the final phase, the mozzarella transforms into a gooey, molten layer over the top of the pasta. The heat remaining in the cooker is sufficient to melt the cheese without requiring additional cooking time. The final result should look appetizing, with the cheese fully integrated into the top layer of the pasta bake. Ensure the cheese is melted uniformly across the entire surface. Once it reaches this state, the dish is ready to be served immediately while hot.
Common mistakes
A common mistake is using too much liquid or not enough, which can lead to either undercooked, crunchy pasta or a soup-like consistency. Ensure the sauce covers the pasta adequately but does not drown it.
Another frequent error is opening the lid too often during the cooking process, which releases essential heat and moisture and significantly extends the cooking time. Finally, do not add the cheese too early; it should only be added at the end of the cooking cycle to prevent it from becoming rubbery or burnt.
How to tell it’s done
The dish is ready when the chicken reaches an internal temperature of 165°F (74°C) as verified by a food thermometer. The pasta should be tender but still retain a slight bite, known as al dente.
The sauce should be thickened and clinging to the pasta, and the cheese should be completely melted and bubbly. If the sauce appears too thin, you can let it cook for an additional 10 minutes with the lid off to allow some moisture to evaporate and the sauce to concentrate further.
- Poultry: 165°F (74°C) in the thickest part
Up next · Part 3 of 3
2 variations · storage & make-ahead · 3 answers · printable card
Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)