Creamy pepper jack sauce clings to tender penne, juicy chicken, and sweet sautéed peppers in this colorful cheesy chicken pasta one pot. The chili powder, cumin, and garlic give it a gently smoky, savory kick without making it overly spicy.
Everything cooks in one large pot, including the pasta, so the milk reduces into a rich sauce as the penne becomes tender. It’s a comforting dinner with very little cleanup and plenty of cheesy pulls at the table.
The method is straightforward, but a few small details—stirring the pasta and adding the cheese off the heat—make a big difference in keeping the sauce smooth and the pasta nicely coated.
Why You’ll Love This Recipe
- One-pot dinner: The chicken, vegetables, pasta, and sauce all come together in the same pot.
- Big flavor from simple spices: Chili powder, cumin, and garlic powder season every bite.
- Cheesy and creamy: Pepper jack melts into a thick sauce with a little welcome warmth.
- Colorful and filling: Three bell peppers add sweetness, texture, and a bright finish.
Ingredient Notes
- Chicken breasts: Slice them into even, bite-size strips so they cook quickly and stay tender. Boneless chicken thighs work well too; they may need an extra minute or two.
- Bell peppers and onion: Using red, green, and yellow peppers creates a pretty mix and layers of sweetness. Use any colors you have, or swap one pepper for a poblano for more heat.
- Penne: This sturdy, tube-shaped pasta holds the creamy sauce well. Rigatoni or ziti are good substitutes; avoid delicate noodles that can overcook during the longer simmer.
- Milk: Whole milk gives the sauce the fullest texture. Two percent can work, though the sauce will be a little lighter. Keep the heat at a gentle simmer so the milk doesn’t scorch.
- Pepper jack cheese: Freshly shredded cheese melts more smoothly than pre-shredded cheese, which often contains anti-caking agents. Monterey Jack is a mild alternative, while a little cheddar makes the flavor sharper.
Cheesy Chicken Pasta One Pot
Ingredients
- 3 tablespoons neutral oil
- 3 chicken breasts, sliced into bite-size strips
- 1 red bell pepper, sliced
- 1 green bell pepper, sliced
- 1 yellow bell pepper, sliced
- 1 yellow onion, sliced
- 1 teaspoon kosher salt
- 1 teaspoon freshly ground black pepper
- 1 tablespoon chili powder
- 1 tablespoon ground cumin
- 1 tablespoon garlic powder
- 5 cups milk
- 4 cups dry penne pasta
- 1 cup shredded pepper jack cheese
Instructions
- Heat the oil in a large, heavy-bottomed pot or Dutch oven over medium-high heat. Add the sliced chicken in an even layer and cook for 5 to 6 minutes, stirring occasionally, until it is no longer pink in the center. Transfer the chicken to a plate. Removing it now keeps it from becoming dry while the vegetables cook.
- Add the red, green, and yellow bell peppers along with the onion to the same pot. Cook for about 6 minutes, stirring often and scraping up any flavorful browned bits, until the onion is soft and the peppers have begun to soften.

- Return the chicken and any juices from the plate to the pot. Sprinkle in the salt, black pepper, chili powder, cumin, and garlic powder. Stir for about 30 seconds, just until the spices coat the chicken and vegetables and smell fragrant.
- Pour in the milk, then add the dry penne. Stir thoroughly, making sure the pasta is mostly submerged and separated. Bring the mixture just to a gentle simmer; a hard boil can cause milk to catch on the bottom of the pot.
- Cook for about 20 minutes, stirring every few minutes and more often near the end, until the penne is tender and the milk has reduced into a thick, creamy sauce. If the pot seems to be simmering too aggressively, lower the heat. Frequent stirring prevents pasta from sticking and helps the starch naturally thicken the sauce.

- Take the pot off the heat and stir in the shredded pepper jack cheese until fully melted and glossy. Let the pasta rest for 2 to 3 minutes before serving so the sauce can settle and cling to the penne.
Tips & Variations
- Use a roomy pot. A large pot gives the pasta space to move as you stir, which helps it cook evenly and reduces sticking.
- Keep the simmer gentle. Milk-based sauces need moderate heat. A calm simmer thickens the sauce without scorching it or making the dairy separate.
- Shred the cheese yourself when possible. It melts into a silkier sauce, especially important in this cheesy chicken pasta one pot where cheese is the final finish.
- Adjust the heat to your taste. For a milder dish, use Monterey Jack in place of pepper jack. For more spice, add sliced jalapeño with the bell peppers or choose hot pepper jack.
Serving and Storage
Serve this cheesy chicken pasta one pot hot with a crisp green salad, steamed broccoli, or simple roasted green beans. Garlic bread is especially good for scooping up the extra creamy sauce.
Cool leftovers promptly, then refrigerate them in an airtight container for up to 3 days. The pasta will absorb more sauce as it sits, so add a splash of milk when reheating. Warm it gently in a covered skillet over low heat, stirring occasionally, or microwave individual portions in short intervals until hot.

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Frequently Asked Questions
Can I use a different pasta shape?
Yes. Rigatoni, ziti, or medium shells are sturdy choices for this one-pot method. Keep an eye on the simmer because different shapes can need slightly different cooking times.
Why does the pasta need to be stirred while it cooks?
Stirring separates the penne and keeps it from settling onto the bottom of the pot, where milk can scorch. It also distributes the starch that helps create the creamy sauce.
Can I make this cheesy chicken pasta one pot ahead?
It’s best right after cooking, when the sauce is loosest and creamiest. You can slice the chicken and vegetables ahead, then cook the dish when you’re ready to eat. Leftovers reheat well with a little milk.
What should I do if the sauce gets too thick?
Stir in milk a tablespoon or two at a time over low heat until the sauce loosens to your liking. The sauce naturally thickens as it cools, so give it a brief rest before adding too much liquid.


