Silky Garlic Butter Chicken Alfredo turns tender slow-cooked chicken, penne, Parmesan, sun-dried tomatoes, and gentle chili heat into a creamy one-pot dinner with no separate boiling or draining.
This is the kind of comforting pasta dinner that works especially well when you want something rich and satisfying without spending the evening standing over the stove. The slow cooker handles the chicken and sauce first, then finishes the pasta directly in the same pot.
Garlic butter creates the savory foundation, while cream cheese, heavy cream, and freshly grated Parmesan give the sauce its smooth, full-bodied texture. Sun-dried tomatoes add concentrated flavor and a pleasant touch of acidity that keeps the sauce from tasting too heavy.
Adding the dry penne near the end is what makes the method so convenient. As the pasta cooks, it absorbs the seasoned cream sauce instead of plain boiling water, giving every bite more flavor while keeping cleanup to a minimum.
Garlic Butter Chicken Alfredo Ingredients
Boneless, skinless chicken breasts: Use 1½ pounds of chicken as the hearty protein for this slow-cooked pasta. The chicken becomes tender enough to shred easily after cooking.
Heavy whipping cream: The 2½ cups of cream form the rich base of the Alfredo-style sauce and provide enough liquid to help cook the pasta.
Chicken broth: One cup loosens the cream mixture, adds savory depth, and helps keep the sauce from becoming overly thick before the penne finishes cooking.
Cream cheese: Four ounces melt into the sauce and give it a velvety consistency with a subtle tang.
Unsalted butter: Four tablespoons of cubed butter create a rich garlic butter flavor while allowing you to control the overall salt level.
Fresh garlic: Four finely minced cloves bring a clear, savory garlic flavor that spreads throughout the sauce as it cooks.
Sun-dried tomatoes: One-third cup of chopped tomatoes adds a concentrated sweet-tart flavor and small bursts of color.
Seasonings: Salt, ground black pepper, and crushed red pepper flakes balance the richness and provide a mild background warmth.
Dry penne pasta: Eight ounces of uncooked penne go directly into the slow cooker during the final stage. Its ridges and hollow center hold plenty of sauce.
Freshly grated Parmesan: About four-fifths of a cup thickens the sauce and provides the familiar salty, nutty Alfredo flavor. Keep extra Parmesan available for serving.
Fresh basil: Torn basil leaves add color and a fresh herbal finish just before the pasta reaches the table.
Cooking Steps
STEP 1: Arrange the chicken breasts in the bottom of the slow cooker. Add the cream cheese, cubed butter, minced garlic, chopped sun-dried tomatoes, salt, black pepper, and crushed red pepper flakes. Pour the chicken broth and heavy cream over everything.
STEP 2: Cover the slow cooker and cook the chicken on HIGH for about 2 hours 30 minutes. For a slower schedule, cook it on LOW for 4 to 5 hours. Begin checking at the earliest time because slow cookers can vary considerably in temperature.
STEP 3: Confirm that the thickest part of each chicken breast has reached 165°F or 74°C. Transfer the cooked chicken to a plate or cutting board and shred it into bite-sized pieces using two forks.
STEP 4: Return the shredded chicken to the slow cooker. Stir thoroughly, pressing and mixing the softened cream cheese into the liquid until the sauce looks evenly combined. A few small cream cheese streaks are fine because they will continue melting.
STEP 5: Add the dry penne and grated Parmesan. Stir until every piece of pasta is coated, then gently press the penne beneath the surface of the sauce. Keeping it submerged is important because exposed pasta may remain firm.
STEP 6: Cover and cook on HIGH for approximately 38 minutes. Stir once around the halfway point, making sure the pasta along the sides and top is moved back into the sauce. Continue cooking until the penne is tender and the sauce clings to it.
STEP 7: Turn off the slow cooker and let the pasta rest uncovered for about 5 minutes if the sauce appears loose. It will continue to thicken as it stands. Finish with torn basil and additional freshly grated Parmesan before serving.
Can I substitute another pasta shape?
Yes, but select a sturdy medium-size pasta with a cooking time similar to penne. Rigatoni, ziti, or rotini can work well. Very small pasta may cook too quickly, while large or thick shapes may require more liquid and a longer cooking time.
Keeping Leftovers Fresh
Transfer leftovers to a covered container once the pasta has cooled. Refrigerate them promptly and use within 3 to 4 days. The pasta will continue absorbing sauce while stored, so the mixture may be noticeably thicker the following day.
Freezing is possible for up to one month, although it is not the preferred storage method. Cream-based sauces can separate after thawing, and fully cooked pasta may become softer. Freeze individual portions so they thaw and reheat more evenly.
For the creamiest reheating result, warm the Alfredo slowly in a covered skillet or saucepan over low heat. Add a small splash of chicken broth, cream, or milk and stir frequently until heated through.
A microwave also works for individual portions. Cover the dish loosely, heat in short intervals, and stir between each interval. Add a spoonful of liquid if the pasta begins to look dry.
How do I prevent the sauce from separating?
Use freshly grated Parmesan and add it with the pasta rather than during the first cooking stage. Pre-shredded cheese may contain coatings that prevent smooth melting. Stirring the softened cream cheese thoroughly before adding the penne also helps produce a more consistent sauce.
Perfect Pairings
- Garlic bread: Crisp garlic bread is ideal for collecting the creamy sauce left at the bottom of each bowl.
- Simple green salad: Lettuce, cucumber, and a tangy vinaigrette provide a fresh contrast to the rich pasta.
- Roasted vegetables: Broccoli, asparagus, or green beans add color and make the meal feel more complete without competing with the garlic butter flavors.
Is this chicken Alfredo very spicy?
The crushed red pepper provides gentle warmth rather than intense heat. For a milder family dinner, reduce it to a small pinch or leave it out completely. For additional heat, serve extra red pepper flakes at the table instead of adding more to the entire slow cooker.
Helpful Tips
- Grate the Parmesan from a block shortly before using it. Freshly grated cheese melts more smoothly and creates a better sauce texture than packaged shredded cheese.
- Check the pasta after about 30 minutes. Slow cookers vary, and the penne can change from pleasantly tender to overly soft in a relatively short period.
- Stir the pasta carefully but thoroughly halfway through cooking. Move the pieces near the edges toward the center and press any exposed penne back beneath the sauce.
Why does the pasta need to stay submerged?
Dry pasta requires direct contact with the hot liquid to soften evenly. Penne left above the sauce can remain chewy or develop firm edges. Stirring once during cooking redistributes the pasta and helps every piece absorb the creamy garlic butter sauce at a similar rate.
Silky Garlic Butter Chicken Alfredo
Ingredients
- ⅓ cup fresh basil leaves torn, for garnish
- 2½ cups heavy whipping cream
- 4 garlic cloves finely minced
- 8 ounces dry penne pasta
- ½ teaspoon crushed red pepper flakes
- 4 ounces cream cheese
- ⅓ cup chopped sun-dried tomatoes
- 1½ pounds boneless skinless chicken breasts
- 1 teaspoon salt
- ⅘ cup freshly grated Parmesan cheese plus additional cheese for serving
- 4 tablespoons unsalted butter cut into cubes
- 1 cup chicken broth
- ½ teaspoon ground black pepper
Instructions
- Place the chicken breasts, cream cheese, cubed butter, minced garlic, chopped sun-dried tomatoes, salt, black pepper, red pepper flakes, chicken broth, and heavy whipping cream directly into the slow cooker.
- Cover the slow cooker and cook on HIGH for 2 hours 30 minutes, or on LOW for 4 to 5 hours, until the chicken is completely cooked and tender. Begin checking the chicken at the earliest stated cooking time.
- Transfer the cooked chicken to a plate or cutting board. Shred it using two forks, then return the shredded meat to the slow cooker. Stir the mixture thoroughly so the softened cream cheese blends evenly into the sauce.
- Add the uncooked penne and grated Parmesan. Stir until the pasta is fully coated and positioned beneath the surface of the sauce. Cover and continue cooking on HIGH.
- Cook for approximately 38 minutes, stirring once halfway through, until the penne is tender and the sauce has thickened around the pasta.
- Finish with additional freshly grated Parmesan and the torn basil leaves. Serve directly from the slow cooker.