Slow cooker spaghetti sauce is a rich, thick sauce made with ground beef, crushed tomatoes, and a blend of Italian herbs that simmers low and slow until it’s deep in flavor and thick enough to hold its shape on a fork. You brown the meat and onions once, then let the slow cooker do the rest of the work for six hours. It’s the kind of recipe that lets you get dinner started in the morning and walk away from the kitchen for the rest of the day, and still have people asking what you did all day to make it taste this good.
We have close friends who have been through it all with us, the good and the hard, for over 25 years now. They live 800 miles away, but they still make the drive to see us a few times a year, and honestly, some of my favorite parts of those visits happen around the table. Spaghetti is their favorite meal, and I’ve been making my recipe for them for 25 years on the stove. But this last visit, I wanted us to actually get out of the house together instead of me being stuck in the kitchen all day, so I tried my sauce in the slow cooker for the first time. It saved me hours, and the sauce came out just as thick and rich as it always has, maybe even better.
Main Ingredients Needed For Slow Cooker Spaghetti Sauce
Here’s a quick overview of the key ingredients for this recipe. For the full list of ingredients and exact measurements, jump to the recipe card.
- Ground beef: I use 85/15 for this one. I’ve tested different ratios over the years, and a little fat is what gives the sauce real flavor, but too much and it turns greasy, no matter how well you drain it. 85/15 is the sweet spot. You can swap in ground turkey, venison, or Italian sausage, or leave the meat out entirely for a meatless version.
- Onion: Yellow or sweet onion both work well here. If you’re short on time, a bag of frozen diced onion goes straight into the skillet with no chopping.
- Minced garlic: Fresh garlic gives the best flavor, but the jarred kind works fine in a pinch, and garlic powder will get you through if that’s all you have on hand.
- Crushed tomatoes: Three 15-ounce cans, or one large 45-ounce can if your store carries it. San Marzano style tomatoes give the richest flavor if you want to splurge a little.
- Italian seasoning and dried oregano: A good Italian blend plus a little extra oregano rounds out the flavor. If you want to make your own blend, I’ve got a recipe for a Homemade Zesty Italian Seasoning Mix and Dressing that works well here too.
- Brown sugar: Just enough to cut the acidity of the tomatoes. Honey or white sugar will do the same job if that’s what you have.
- Beef broth: This keeps the sauce rich without drying out over the long cook time. Vegetable broth is a fine swap if that’s what’s in your pantry, and I’ve got a full roundup of 25 Easy Substitutes For Beef Broth In A Slow Cooker if you want more options.
- Crushed red pepper flakes: Completely optional, just a pinch if you want a little heat in the background.
How To Make Slow Cooker Spaghetti Sauce
This one comes together in two easy stages: brown the meat, then let the slow cooker take it from there.
Tip: Don’t skip the draining step. Even a little extra grease left behind will make the finished sauce taste greasy instead of rich.
Tip: I always go with low when I have the time, it lets the flavors simmer together longer and gives the best result, but if you’re in a hurry, high still makes a great pot of sauce.
Ways to Change Up This Slow Cooker Spaghetti Sauce
This sauce is easy to make your own, depending on what you’re in the mood for.
- A splash of red wine deepens the flavor if you want something a little more complex, and stirring in chopped bell pepper or mushrooms adds another layer without changing the basic recipe.
- Personally, I love adding a pinch of fennel seed; it gives the sauce that homey, Italian grandma flavor I can’t get enough of. I’ll say this, though: fennel is a distinct flavor, and not every guest loves it, so if you’re serving a crowd with picky eaters, it’s worth leaving it out or serving it on the side.
- For a meat lover’s version, just add another pound of ground beef to the pot.
- If you’re trying to sneak in more vegetables, spinach, zucchini, or shredded carrot all disappear nicely into the sauce, and olives or sun-dried tomatoes give it a bit of a Mediterranean twist.
- Ground turkey or chicken works as a straight swap for the beef if you prefer, and if you want something richer, stirring in a splash of red wine adds a bit of richness to the sauce.
Make-Ahead Tips for Slow Cooker Spaghetti Sauce
This sauce is one of those recipes that’s actually better the next day. You can brown the meat and onion the night before and keep it in the fridge, then add everything to the slow cooker in the morning. That’s exactly what let me get out of the kitchen and spend real time with my friends instead of standing over a pot all day.
If I’m feeding a crowd, this recipe doubles well, and I like to freeze half for another night when I don’t want to cook at all. If it’s heading to a potluck, I bring it in my 8-quart traveling crock pot with a locking, sealed lid. It’s insulated like a cooler, so the sauce stays hot on the drive over, and once I get there, I just pop the lid off, set it to warm, and it doubles as my serving bowl.
My Favorite Slow Cooker Tools
Questions When Making Slow Cooker Spaghetti Sauce
You can, but I always brown the beef and onion in a skillet first. It builds a deeper flavor into the sauce and lets you drain off the excess fat before it ever goes into the slow cooker, so the finished sauce doesn’t taste greasy.
The tomato paste does most of the work here; it’s what gives the sauce that thick, clingy texture instead of something thin and watery. By the end of the cook time, you’ll know it’s right when the sauce is a deep red and coats the back of a spoon instead of running off it.
Slow Cooker Spaghetti Sauce
Ingredients
- 1 pound ground beef, 2 pounds if you want it extra meaty
- ½ cup onion, diced
- 1 tablespoon minced garlic
- 45 ounces crushed tomatoes, canned; three 15-ounce cans
- 30 ounces tomato sauce, canned; two 15-ounce cans
- 6 ounces tomato paste, canned; one 6-ounce can
- 2 bay leaves
- 1 tablespoon Italian seasoning
- 1 teaspoon dried oregano
- 1 tablespoon balsamic vinegar
- 1 tablespoon brown sugar
- ½ teaspoon salt
- ½ teaspoon black pepper
- ½ cup beef broth
- 1/4 teaspoon crushed red pepper flakes, optional, for a touch of heat
Instructions
Brown the Meat
- In a large skillet over medium heat, cook the ground beef, diced onion, and minced garlic until the beef is browned and the onion is soft, about 5 to 7 minutes.1 pound ground beef, ½ cup onion, 1 tablespoon minced garlic
Drain Fat
- Carefully drain off any excess fat from the skillet.
Combine Ingredients
- Transfer the cooked meat mixture to your slow cooker. Add the crushed tomatoes, tomato sauce, tomato paste, bay leaves, Italian seasoning, dried oregano, balsamic vinegar, brown sugar, salt, black pepper, beef broth, and red pepper flakes if using.45 ounces crushed tomatoes, 30 ounces tomato sauce, 6 ounces tomato paste, 2 bay leaves, 1 tablespoon Italian seasoning, 1 teaspoon dried oregano, 1 tablespoon balsamic vinegar, 1 tablespoon brown sugar, ½ teaspoon salt, ½ teaspoon black pepper, ½ cup beef broth, 1/4 teaspoon crushed red pepper flakes
Slow Cook
- Stir everything together well. Cover and cook on low for 6 hours, or on high for 4 hours, until the sauce is deep red and thick enough to cling to a spoon.
Serve
- Remove the bay leaves before serving. Spoon the sauce over your favorite cooked pasta.
Gina’s Notes and Tips
Tried this recipe?
Please consider Leaving a Review!Hospitality with Slow Cooker Spaghetti Sauce
If I’m doing a full Italian night for company, this sauce is the whole reason I can actually enjoy it instead of being stuck at the stove the whole time everyone’s there. I’ll put a Fresh Tomato Salad With Italian Herbs out on the counter and let it sit while the sauce simmers, and I always warm up a loaf of Italian Cheesy Pull Apart Bread, because honestly, everybody lights up a little when there’s warm cheesy bread waiting on the table. For the table, I keep it simple: a checkered runner, some basil or greenery down the middle, candles that don’t even match, and if I remember, a carafe of wine already poured so nobody’s waiting on me. None of it has to be Pinterest perfect; it just needs to feel like somebody was expecting them, and honestly, the part that matters most isn’t the table anyway. It’s having the sauce already going before anyone rings the doorbell, so I’m at the door instead of yelling from the kitchen when they walk in. I think that’s a small picture of what it means to love somebody well before they even ask for it. What people carry home isn’t the menu; it’s that they were welcomed and known.