Parmesan Garlic Chicken Marinara Tortellini Step-by-step instructions

Before you start

Before you begin, cube the chicken breast tenderloins into bite-sized pieces. Measure out the shredded Italian cheese blend and grate the Parmesan. Have the tortellini and marinara sauce ready to open.

No other prep is needed — this recipe is truly dump-and-go. If you have time, let the chicken sit at room temperature for 15–20 minutes before adding it to the slow cooker, but don't leave it out longer than 30 minutes.

Instructions

Layer and Top

1. 1Layer the Base
   Place the cubed chicken breast tenderloins in the bottom of a 6-quart slow cooker. Spread them into an even layer. Scatter the refrigerated three-cheese tortellini over the chicken. Pour the crushed San Marzano marinara sauce over the top, making sure the liquid covers most of the ingredients.
   Look for The chicken is covered with tortellini and sauce, creating a dense, saucy base.
   Tip No need to stir — layering keeps the tortellini from overcooking on the bottom.
2. 2Top with Cheeses
   Sprinkle the shredded Italian four-cheese blend evenly over the sauce. Finish with the freshly grated Parmigiano-Reggiano, covering the surface completely.
   Look for The top is covered with a thick layer of shredded and grated cheese.
   Tip Grating the Parmesan fresh gives a much better melt and flavor than pre-grated.

The slow cooker contains an even layer of chicken, topped with tortellini and covered with marinara. The cheese is sprinkled over the sauce, creating a thick, white and yellow layer.

The ingredients are raw and unmixed, but the colors are vibrant — pale chicken, golden pasta, and deep red sauce. This is the moment before the slow cooker works its magic.

Simmer and Melt

3. 3Slow Cook Until Tender
   Cover the slow cooker and cook on LOW for 4 hours, or on HIGH for 2 hours, until the chicken is cooked through and the tortellini are tender. Do not stir during cooking, as this can break up the tortellini.
   Look for The sauce is bubbling gently around the edges, and the cheese has melted into a golden crust.
   Safe temperature 165°F (74°C) internal temperature (poultry)
   Tip Resist the urge to lift the lid — each peek adds 20 minutes to the cooking time.
4. 4Check Chicken Temperature
   After the cooking time is up, check that the chicken has reached 165°F (74°C) using an instant-read thermometer inserted into a few pieces. The tortellini should be tender but not mushy.
   Look for The chicken is opaque and registers 165°F (74°C); the tortellini are plump and tender.
   Safe temperature 165°F (74°C) internal temperature (poultry)
   Tip If the chicken isn't done, return the lid and cook for another 15–30 minutes.

After 4 hours on low, the slow cooker is bubbling gently around the edges. The cheese has melted into a glossy, golden blanket. The aroma is rich with garlic, tomato, and herbs. The chicken is cooked through and tender, and the tortellini are plump. The sauce has thickened slightly, coating the ingredients. The dish is ready for serving.

Serve

5. 5Serve and Enjoy
   Stir gently to combine the sauce and melted cheese. Serve directly from the slow cooker, or spoon onto plates. Garnish with extra Parmesan if desired.
   Look for The sauce is creamy and the cheese stretches as you lift the spoon.
   Tip For a crispier top, switch to BROIL for 2–3 minutes after cooking, watching closely.

The final dish is a bubbling, cheesy casserole with a golden crust. When you lift a spoonful, the cheese stretches and the sauce is creamy and thick. The chicken is fork-tender, the tortellini are soft and chewy, and the flavors are deeply blended. Serve immediately for the best texture, with extra Parmesan on the side.

Common mistakes

One common mistake is stirring the slow cooker during cooking, which can break the tortellini and turn the sauce cloudy. Another is lifting the lid too often, which releases heat and extends cooking time.

Using too much cheese can make the dish greasy; stick to the amounts listed. Also, avoid overcooking — if the tortellini are mushy, the dish is overdone. Finally, always check the chicken temperature to ensure food safety.

How to tell it’s done

The dish is done when the chicken reaches 165°F (74°C) on an instant-read thermometer and the tortellini are tender but still hold their shape. The sauce should be bubbling and the cheese melted and golden on top.

If the chicken isn't cooked through, continue cooking and check again after 15 minutes. The total cooking time may vary depending on your slow cooker, so always rely on temperature, not just time.

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