Granny’s Cajun Spaghetti

This is the spaghetti my grandmother grew up eating in Houma and Thibodaux, Louisiana, and it is unlike any spaghetti you have ever made from a jar of store-bought marinara. The sauce starts with a prepared Cajun roux that gives it an incredible depth of flavor you simply cannot get any other way. Rich, slightly nutty, and deeply savory from the first simmer, this is old-fashioned Louisiana comfort food that has been passed down through generations for a reason.

The roux is everything here. Where Italian-American spaghetti sauces build their flavor from olive oil, herbs, and slow-cooked tomatoes, this Cajun version starts from an entirely different foundation. A dark, prepared roux melted down with onion and garlic before the tomatoes ever go in produces a sauce with a complexity and depth that is unmistakably Southern Louisiana and completely unlike anything else on the table.

Why You’ll Love This Recipe

The roux base produces a depth of flavor in the tomato sauce that is impossible to achieve any other way. This is not just spaghetti sauce. It is something genuinely different.

The 1-hour simmer after all the ingredients come together develops the sauce from the sum of its parts into something cohesive, rich, and deeply flavorful that tastes like it has been cooking all day.

This is a recipe with real history and real roots. Every bowl carries the flavors of Southern Louisiana cooking that has been passed down through generations.

It makes a large batch that improves overnight and feeds a crowd generously from one pot.

Ingredients Needed to Make Cajun Spaghetti

Simple, Southern Louisiana ingredients. Here is what you need.

The Roux Base

Prepared roux is the defining ingredient of this recipe. A dark Cajun roux, made from equal parts flour and fat cooked low and slow until deeply brown and nutty, is available jarred at most Southern grocery stores and online. It melts into the pot and builds a savory, slightly nutty, deeply complex sauce base that no other ingredient can replicate.

The Aromatics

A small onion finely minced and minced garlic sautéed in the melted roux form the Cajun aromatic base that builds the flavor of the entire sauce.

The Tomato Components

Tomato paste caramelized briefly before the sauce goes in adds a concentrated, slightly sweet depth. Two cans of tomato sauce plus two cans of water produce the sauce volume. The water also helps thin the roux to the right consistency during the initial whisking step.

The Meat

Three pounds of ground beef seasoned with salt, black pepper, and Italian seasoning and browned separately before being added to the sauce is the hearty protein base that makes this a substantial, filling meal.

How to Make Cajun Spaghetti

One large Dutch oven, one skillet, just over an hour.

Step 1: Brown the Ground Beef

Season the ground beef generously with salt, black pepper, and Italian seasoning. Brown in a large skillet over medium-high heat, breaking apart as it cooks, until fully browned with no pink remaining. Drain the excess grease thoroughly and set aside.

Step 2: Melt the Roux

In a large Dutch oven or heavy-bottomed pot over medium heat, add the prepared roux and let it melt completely, stirring as it liquefies.

Step 3: Cook the Aromatics

Add the finely minced onion and minced garlic to the melted roux. Cook, stirring occasionally, for several minutes until the onion is completely softened and translucent and the garlic is fragrant.

Step 4: Whisk in the Water

Add the 1 cup of water to the roux and aromatics. Whisk continuously until the roux is completely smooth with no lumps remaining and the mixture looks uniform and slightly thickened.

Step 5: Caramelize the Tomato Paste

Add the tomato paste directly to the pot. Stir constantly for about 60 seconds until the paste darkens slightly in color and smells caramelized and concentrated rather than raw.

Step 6: Add the Tomato Sauce

Pour in both cans of tomato sauce. Fill each empty can with water and add that liquid to the pot as well. Stir everything together until the roux base and tomato sauce are fully combined into a cohesive, deeply colored sauce.

Step 7: Add the Beef and Simmer

Add the cooked ground beef to the sauce and stir to incorporate throughout. Bring to a gentle simmer over medium-low heat. Cook uncovered for approximately 1 hour, stirring occasionally, until the sauce has deepened in color, thickened slightly, and all the flavors have fully developed and melded together.

Step 8: Serve

Ladle generously over cooked spaghetti and finish each bowl with plenty of freshly grated Parmesan cheese.

Storing and Reheating

Store in a sealed airtight container in the refrigerator for up to 4 days. This sauce is genuinely better on day two and day three as the roux continues to develop its flavor throughout the sauce overnight. Reheat in a covered pot over medium-low heat, stirring occasionally and adding a small splash of water if needed to loosen the sauce to the right consistency. The microwave works on medium power in 60-second intervals. This sauce also freezes beautifully for up to 3 months. Cool completely before transferring to freezer-safe containers.

Granny’s Cajun Spaghetti

This is the spaghetti my grandmother grew up eating in Houma and Thibodaux, Louisiana. Unlike traditional Italian spaghetti, this version starts with a rich Cajun roux that gives the sauce an incredible depth of flavor you just can’t get any other way. It’s simple, hearty comfort food that has been passed down through generations, and one bite will remind you why the old family recipes are always the best.

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Ingredients

  

• 4 heaping tablespoons prepared roux
• 2 heaping tablespoons minced garlic
• 1 small onion finely minced
• 1 cup water
• 1 6-ounce can tomato paste
• 2 15-ounce cans tomato sauce
• 2 cans water using the empty tomato sauce cans
• 3 pounds ground beef
• Salt black pepper, and Italian seasoning, to taste
• Cooked spaghetti
• Freshly grated Parmesan cheese for serving

Method

 

1. Brown the ground beef in a large skillet, seasoning it with salt, black pepper, and Italian seasoning. Drain any excess grease and set aside.
2. In a large Dutch oven or heavy-bottomed pot, melt the prepared roux over medium heat.
3. Add the minced garlic and onion, cooking for several minutes until softened and fragrant.
4. Stir in 1 cup of water, whisking until the roux is completely smooth.
5. Add the tomato paste and cook, stirring constantly, for about 60 seconds to lightly caramelize the paste and deepen its flavor.
6. Pour in the tomato sauce along with two cans of water. Stir until everything is well combined.
7. Add the cooked ground beef to the sauce and stir well.
8. Bring the sauce to a gentle simmer and cook for about 1 hour, stirring occasionally to allow all of the flavors to come together.
9. Serve generously over cooked spaghetti and finish with plenty of freshly grated Parmesan cheese.

Notes

Browning the tomato paste before adding the tomato sauce creates a richer, deeper flavor.
A heavy Dutch oven works best because it maintains an even, gentle simmer.
This sauce tastes even better the next day after the flavors have had time to develop.
Serve with warm French bread or garlic bread to soak up every last bit of sauce.