Recipe

Dirty Spaghetti

Smoky sausage, Cajun-style seasoning, and a glossy tomato gravy tossed with spaghetti for an easy, cozy dinner.

By Matt Campbell

•

4.8

A shallow bowl of dirty spaghetti with smoky sausage crumbles, a glossy red-brown tomato gravy, and chopped parsley on top, set on a warm kitchen table with a fork

Dirty spaghetti is what happens when spaghetti decides it wants to be a little louder. Think: smoky sausage, onion and peppers, Cajun-style seasoning, and a tomato gravy that clings to the noodles like it has plans for your leftovers. It is cozy, a little messy (in the best way), and built for weeknights when you want maximum flavor without a sink full of dishes.

This version keeps ingredients easy to find and the steps straight. The only rule is to taste as you go, because the spice level is totally in your hands.

Raw ingredients for dirty spaghetti arranged on a kitchen counter, including spaghetti, smoked sausage, bell peppers, onion, garlic, canned tomatoes, broth, and spices

Why It Works

Big flavor fast: browning the sausage first builds that smoky, savory base that makes the sauce taste like it simmered all day.
A sauce that actually sticks: a quick flour-thickened tomato gravy plus a splash of pasta water gives you a glossy, clingy finish instead of a watery sauce.
One pot, one skillet: spaghetti cooks while the sauce simmers, so dinner lands on the table without a pile of dishes.
Easy to customize: mild or spicy, extra veggies, or even a creamy finish. It plays nice with what you have.

Pairs Well With

Storage Tips

Refrigerate: Store leftovers in an airtight container for 3 to 4 days.

Reheat: Warm in a skillet over medium-low with a splash of water or broth, tossing until loosened and glossy again. Microwave works too, just add a small splash of liquid and stir halfway through.

Freeze: Freeze up to 2 months. Thaw overnight in the fridge for best texture.

Make-ahead tip: The sauce can be made 1 to 2 days ahead. Reheat and toss with freshly cooked spaghetti when ready to serve.

Common Questions

Why is it called dirty spaghetti?

It is often called “dirty” the same way dirty rice is. The pasta gets tossed in a deeply seasoned, brown-red tomato gravy from browned sausage, spices, and aromatics, so everything looks a little messy and tastes very bold.

Is dirty spaghetti spicy?

It can be, but it does not have to be. Use mild smoked sausage, choose a lower-heat Cajun-style seasoning, and skip the cayenne or red pepper flakes if you want it family-friendly.

What sausage works best?

Smoked sausage (like kielbasa style), andouille for more heat, or even ground pork or turkey sausage. The key is browning it well for flavor.

Can I make it without flour?

Yes. Skip the flour and simmer the sauce a few extra minutes to reduce. You can also thicken with a cornstarch slurry (1 teaspoon cornstarch mixed with 1 tablespoon cold water) added at the end.

My Cajun seasoning is salty. What should I do?

Some Cajun-style blends are salt-free and some are very salty. Start with a smaller amount if you are unsure, then adjust at the end. Hold off on adding extra salt until you taste the finished sauce.

What if my sauce tastes too salty?

Add a splash more broth, a little extra crushed or diced tomatoes, or a squeeze of lemon to balance. Tossing with a little reserved pasta water can also help dilute and smooth the seasoning.

A skillet on a stovetop with dirty spaghetti sauce simmering, showing browned sausage, peppers, and a thick tomato gravy bubbling gently

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

Large pot for boiling pasta
Large deep skillet or Dutch oven (12-inch works great)
Wooden spoon or sturdy spatula
Chef’s knife and cutting board
Measuring spoons and cups
Colander

I started making dirty spaghetti when I was in my “feed everyone fast” era and realized the best dinners usually begin with browning something in a pan and getting a little fearless with seasoning. It is the kind of meal that feels like a warm hoodie. It is not fancy, but it is confident. And honestly, I love a recipe that tastes like you did the most, even when you definitely did not.

Dirty Spaghetti

(4.8 Reviews)

Prep Time 15 minutes

Cook Time 25 minutes

Total Time 40 minutes

Servings 6

Ingredients

12 oz spaghetti
1 lb smoked sausage (or andouille), sliced into half-moons
1 tbsp olive oil (only if your sausage is very lean)
1 medium yellow onion, diced
1 green bell pepper, diced
1 red bell pepper, diced
3 cloves garlic, minced
2 tbsp all-purpose flour
2 tbsp tomato paste
1 (14.5 oz) can diced tomatoes, with juices
1 (8 oz) can tomato sauce
1 1/2 cups chicken broth (or beef broth)
1 tbsp Cajun-style seasoning (start with 2 tsp if sensitive to heat or using a salty blend)
1 tsp smoked paprika
1/2 tsp dried oregano
1/2 tsp black pepper
1/4 tsp cayenne pepper, optional
1 tbsp Worcestershire sauce
1 to 2 tsp hot sauce, optional
Kosher salt, as needed (depends on your sausage and seasoning blend)
1/2 cup reserved pasta water, as needed
2 green onions, thinly sliced (optional)
2 tbsp chopped parsley (optional)
Grated Parmesan for serving (optional)

Chopped onion, bell peppers, and minced garlic on a cutting board on a kitchen counter, ready for cooking

Instructions

Get the pasta water going. Bring a large pot of well-salted water to a boil. You will cook the spaghetti a little later so it finishes right when the sauce is ready.
Brown the sausage. Heat a large deep skillet over medium-high heat. Add sausage (and olive oil if needed). Cook 4 to 6 minutes, stirring occasionally, until browned with crisp edges. Transfer sausage to a plate, leaving the drippings in the pan.
Soften the vegetables. Lower heat to medium. Add onion and both bell peppers. Cook 5 to 7 minutes, scraping up browned bits, until softened. Stir in garlic and cook 30 seconds.
Start the pasta. When the vegetables are soft, drop the spaghetti into the boiling water. Cook until just shy of al dente, about 1 minute less than the package says. Reserve 1 cup pasta water, then drain.
Build the gravy base. Sprinkle flour over the vegetables and stir constantly for 1 to 2 minutes. Add tomato paste and cook 1 more minute until it darkens slightly and smells toasty.
Simmer the sauce. Add diced tomatoes, tomato sauce, and broth. Stir in Cajun-style seasoning, smoked paprika, oregano, black pepper, Worcestershire, and optional cayenne and hot sauce. Bring to a gentle simmer and cook until the sauce coats a spoon and no raw flour smell remains, 6 to 10 minutes, stirring occasionally.
Add the sausage back in. Return browned sausage (and any juices) to the skillet. Simmer 2 minutes so the flavors meld.
Toss with spaghetti. Add drained spaghetti to the skillet and toss until coated. If it looks tight or dry, add reserved pasta water a splash at a time until it turns glossy and saucy.
Taste and finish. Taste and adjust seasoning. Add salt only if needed, especially if your Cajun seasoning or sausage is already salty. Top with green onions or parsley, and serve with Parmesan if you like.

Tips and Variations

Keep it kid-friendly: use mild sausage, start with 2 teaspoons Cajun-style seasoning, and skip cayenne and hot sauce.
Make it extra dirty: add 1/2 cup finely diced celery with the onion and peppers, or stir in 1/2 cup finely chopped mushrooms for more savory depth.
Easy veggie add-ins: stir in 1 cup corn, diced zucchini, or sliced okra during the simmer so it turns tender.
Creamy option: stir in 1/4 cup heavy cream at the end for a richer, rosier gravy.
Cheesy baked version: toss pasta and sauce, transfer to a baking dish, top with 1 1/2 cups shredded mozzarella, and bake at 400°F for 10 to 15 minutes until bubbly.
Short on time: swap sliced sausage for 1 lb ground sausage. Brown it well, then continue as written.
Rescue a too-spicy pan: add a spoonful of sour cream, a splash of cream, or a little extra tomato sauce and broth to mellow the heat.

A warm family dinner table setting with a serving bowl of dirty spaghetti, plates, and simple silverware under soft kitchen lighting

Nutrition information is estimated.

Did you make this? Tag @Mom's Best Recipes

Dirty Spaghetti

Why It Works

Pairs Well With

Recommended

One-Pot Taco Spaghetti

Taco Pasta

Baked Spaghetti

Million Dollar Spaghetti

Storage Tips

Common Questions

Why is it called dirty spaghetti?

Is dirty spaghetti spicy?

What sausage works best?

Can I make it without flour?

My Cajun seasoning is salty. What should I do?

What if my sauce tastes too salty?

Dirty Spaghetti

Ingredients

Instructions

Tips and Variations