Slow Cooker Pasta Set-and-Forget

Featured in: One-Pot Comforts

This slow cooker pasta brings together tender penne or rigatoni tossed in a robust tomato sauce, enhanced with onions, bell pepper, and zucchini. After a quick sauté (optional for extra flavor), the veggies and sauce ingredients meld together in your slow cooker. Once the pasta is stirred in, everything cooks to perfection, finished with a blanket of melty mozzarella and Parmesan. Serve piping hot with fresh basil for a comforting main dish that’s easy, hearty, and calls for almost no stirring or supervision.

Updated on Thu, 02 Oct 2025 09:41:38 GMT
A steaming bowl of slow cooker pasta, overflowing with rich tomato sauce and bubbly cheese. Save
A steaming bowl of slow cooker pasta, overflowing with rich tomato sauce and bubbly cheese. | kookycrunch.com

This slow cooker pasta dish transforms basic ingredients into a comforting, hands-off meal that's perfect for busy weeknights. The magic happens as the sauce develops deep flavors while the pasta cooks to al dente perfection right in the same pot—no separate boiling required.

I first created this recipe during a particularly chaotic week when my kids had activities every evening. Now it's our Thursday tradition—I load up the slow cooker after lunch, and by dinnertime, we have a homemade meal that tastes like I spent hours in the kitchen.

Ingredients

  • penne or rigatoni: 400g uncooked Choose a sturdy pasta shape that can withstand slow cooking without becoming mushy
  • olive oil: 1 tablespoon Use a good quality extra virgin for better flavor development
  • onion: 1 medium finely chopped Forms the aromatic base of your sauce
  • garlic cloves: 3 minced Fresh is always better than jarred for authentic flavor
  • red bell pepper: 1 diced Adds natural sweetness and vitamin C
  • zucchini: 1 diced Incorporates vegetables seamlessly into the dish
  • canned crushed tomatoes: 800g San Marzano variety offers the best flavor if available
  • tomato paste: 2 tablespoons Concentrated flavor that adds richness and depth
  • Dried herbs: oregano and basil These herbs stand up well to slow cooking
  • vegetable or chicken broth: 2 cups Provides necessary liquid for cooking the pasta
  • Optional cheese: mozzarella and Parmesan Creates that irresistible melty topping
  • Fresh basil leaves: for serving Adds bright fresh flavor at the end

Instructions

Sauté the Aromatics:
Heat olive oil in a skillet over medium heat and cook the onions for 3 minutes until they become translucent. This step builds the flavor foundation for your sauce. The onions should soften but not brown. Add the garlic, bell pepper, and zucchini and cook for 2 more minutes just until the vegetables begin to soften. This quick sauté releases their flavors before slow cooking.
Build the Sauce Base:
Transfer your sautéed vegetables to the slow cooker. Add the crushed tomatoes, tomato paste, oregano, basil, chili flakes if using, salt, pepper, and sugar. The sugar helps balance the acidity of the tomatoes. Stir thoroughly to combine all ingredients into a uniform sauce base.
Add Cooking Liquid:
Pour the broth into the slow cooker and mix well with the sauce ingredients. Ensure everything is evenly distributed as this liquid will eventually cook your pasta. The amount is precisely calculated to yield perfectly cooked pasta that is not too dry or soggy.
Slow Cook the Sauce:
Cover the slow cooker and set it to LOW for 2.5 hours. This extended cooking time allows the flavors to meld and develop complexity. The vegetables will soften completely and integrate into the sauce creating a rich texture.
Add the Pasta:
After the sauce has developed flavor stir in the uncooked pasta ensuring each piece is fully submerged in the sauce. Cover again and increase the heat to HIGH for 30 to 40 minutes. This higher temperature is crucial for properly cooking the pasta. Stir once halfway through to prevent any pasta from sticking together or to the bottom.
Melt the Cheese:
In the final 5 minutes of cooking sprinkle the mozzarella and Parmesan cheeses evenly over the top of the pasta. Replace the lid to allow the cheese to melt into a gooey delicious topping. The residual heat will melt the cheese perfectly without overcooking the pasta.
Garnish and Serve:
Finish the dish by sprinkling torn fresh basil leaves over the top just before serving. The heat will release the basil's aromatic oils enhancing the final presentation and adding bright fresh flavor to contrast with the rich sauce.
This delicious, set-and-forget slow cooker pasta has tender noodles mixed throughout a vibrant sauce. Save
This delicious, set-and-forget slow cooker pasta has tender noodles mixed throughout a vibrant sauce. | kookycrunch.com

The key to this recipe's success is adding the pasta later in the cooking process. I discovered this through trial and error after several batches of mushy pasta! The crushed tomatoes are another non-negotiable ingredient for me. While you might be tempted to use diced tomatoes, the crushed variety creates that perfect sauce consistency that clings to every bite of pasta.

Storage Tips

This pasta dish keeps wonderfully in the refrigerator for up to 4 days in an airtight container. The flavors actually improve overnight as the pasta absorbs more of the sauce. When reheating, add a splash of broth or water to loosen the sauce, as the pasta will continue to absorb liquid as it sits.

For freezing, portion the cooled pasta into freezer-safe containers and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating. The texture may change slightly after freezing, but the flavor remains delicious.

Ingredient Substitutions

This recipe welcomes adaptation based on what you have available. The bell pepper and zucchini can be swapped for almost any vegetables you need to use up. Mushrooms, spinach, carrots, or eggplant all work wonderfully.

For a protein boost, brown 300g of Italian sausage, ground beef, or ground turkey before adding it to the slow cooker. Vegetarians can add a can of drained white beans or chickpeas during the last hour of cooking.

The cheese is customizable too. Try provolone for a more pronounced flavor or fontina for extra creaminess. Dairy-free? Simply omit the cheese or use a plant-based alternative that melts well.

Serving Suggestions

This hearty pasta is a meal in itself, but pairs beautifully with a simple side salad dressed with lemon vinaigrette to cut through the richness. Garlic bread is perfect for sopping up any extra sauce.

For a complete Italian-inspired spread, serve smaller portions as a first course before a simple protein like grilled chicken or fish. A glass of medium-bodied red wine like Chianti or Montepulciano complements the tomato-based sauce perfectly.

Seasonal Adaptations

Summer version Use fresh tomatoes instead of canned when they are in season and abundant

Fall comfort Add diced butternut squash and sage for an autumnal twist

Winter warmer Incorporate hearty greens like kale in the last 30 minutes of cooking

Get ready for dinner: a close-up of creamy, cheesy slow cooker pasta – comforting and satisfying. Save
Get ready for dinner: a close-up of creamy, cheesy slow cooker pasta – comforting and satisfying. | kookycrunch.com

This recipe is a lifesaver on busy nights. Enjoy your delicious, homemade pasta!

Recipe FAQ

Can I use different vegetables in this dish?

Absolutely! Try adding mushrooms, spinach, or eggplant for extra variety and nutrition.

What type of pasta works best?

Penne and rigatoni are ideal, but any short pasta shape that holds sauce well can be used.

How can I make this vegan?

Skip the cheese or substitute with your favorite dairy-free alternatives for a completely vegan meal.

Will gluten-free pasta work?

Yes, use gluten-free pasta and adjust cooking time as it may cook a bit faster than regular pasta.

Can I add meat to this dish?

Add cooked Italian sausage or ground beef with the vegetables for a heartier option.

Do I need to sauté the vegetables first?

Sautéing is optional but enhances the flavor. For true set-and-forget, add raw veggies directly.

Slow Cooker Pasta Set-and-Forget

A cozy pasta dish with tender noodles and flavorful sauce, ready with minimal prep and hands-off cooking.

Prep duration
15 min
Cook duration
195 min
Complete duration
210 min
Created by Jake Peterson


Skill level Easy

Heritage Italian-American

Output 6 Portions

Diet considerations Meat-free

Components

Pasta

01 14 oz uncooked penne or rigatoni

Sauce Base

01 1 tablespoon olive oil
02 1 medium onion, finely chopped
03 3 cloves garlic, minced
04 1 red bell pepper, diced
05 1 zucchini, diced
06 28 oz canned crushed tomatoes
07 2 tablespoons tomato paste
08 1 teaspoon dried oregano
09 1 teaspoon dried basil
10 1/2 teaspoon red pepper flakes (optional)
11 1 teaspoon salt
12 1/2 teaspoon black pepper
13 1 teaspoon sugar

Liquid

01 2 cups vegetable or chicken broth

Cheese (Optional)

01 1 cup shredded mozzarella cheese
02 1/2 cup grated Parmesan cheese

Garnish

01 Fresh basil leaves, for serving

Directions

Phase 01

Optional Flavor Enhancement: In a skillet over medium heat, heat olive oil. Sauté the chopped onion for 3 minutes until translucent. Add minced garlic, diced bell pepper, and diced zucchini, and cook for an additional 2 minutes. This step is optional but enhances the overall flavor profile.

Phase 02

Combine Sauce Ingredients: Transfer the sautéed vegetables (if prepared otherwise, just add the raw chopped vegetables) to the slow cooker. Add crushed tomatoes, tomato paste, dried oregano, dried basil, red pepper flakes (if using), salt, black pepper, and sugar. Stir to thoroughly combine all sauce ingredients.

Phase 03

Incorporate Liquid: Pour the broth into the slow cooker and mix it well with the sauce mixture.

Phase 04

Initial Slow Cooking: Cover the slow cooker and cook on the LOW setting for 2.5 hours.

Phase 05

Add Pasta and Finish Cooking: Stir the uncooked pasta into the sauce in the slow cooker, ensuring it is fully submerged. Cover and cook on the HIGH setting for an additional 30–40 minutes, or until the pasta reaches an al dente texture. Stir the contents once approximately halfway through this cooking period to prevent any sticking.

Phase 06

Melt Cheese Topping: During the final 5 minutes of cooking, evenly sprinkle the shredded mozzarella and grated Parmesan cheeses over the top of the pasta. Cover the slow cooker again and allow the cheese to melt.

Phase 07

Serve and Garnish: Serve the pasta hot, garnished generously with fresh basil leaves.

Necessary tools

  • 5–6 quart slow cooker
  • Skillet (optional)
  • Cutting board
  • Knife
  • Measuring cups and spoons
  • Stirring spoon

Allergy details

Review each component carefully for potential allergens and consult with healthcare professionals if you're uncertain about any ingredient.
  • Contains dairy due to cheese. Omit cheese or use dairy-free alternatives for a vegan preparation.
  • Contains gluten from pasta. Utilize gluten-free pasta to make this dish suitable for gluten-restricted diets.
  • Always verify ingredient labels for potential hidden allergens in packaged goods.

Nutrient breakdown (per portion)

These values are estimates only and shouldn't replace professional medical guidance.
  • Energy: 395
  • Fats: 8 g
  • Carbohydrates: 66 g
  • Proteins: 14 g