You guys — this harvest squash pasta sauce might be the meal I make on repeat all season.
This is the perfect homemade harvest pasta sauce. I want to eat it straight from the pot, spoon it over everything, and yes — even drink it with a straw. It’s that good.
I almost waited to share this until later in October because it’s so cozy and fall-forward, but why delay? Make it now and you’ll be set for weeks. It’s a sauce you’ll want through the whole fall and winter.
When a seasonal recipe lights me up, I can’t hold it in. This is one of those recipes that makes me legitimately excited. It’s the kind of sauce that makes you say, “This is lose-your-mind good.”
If you love squash, you’re in for a treat. Even if the weather is still warm where you are, this sauce is like a warm, comforting hug — perfect for dinner any time you’re craving fall flavors.
This sauce is comforting and versatile. Use it as a traditional pasta sauce, toss it with zoodles, spread it on mini pita pizzas, or spoon it over butternut noodles for a double-squash moment.
Flavor-wise, it’s heavenly. The base builds from deeply caramelized onions, then adds cubes of butternut squash, a touch of pumpkin puree, fire-roasted tomatoes for depth, fresh sage, warm allspice, a hint of nutmeg, a touch of cream, and plenty of parmesan. It’s rich, layered, and balanced.
I used to love the fall pasta sauce from Williams Sonoma and would buy it every year. Trader Joe’s later released a similar jarred version and that’s what pushed me to recreate this at home — with a few tweaks so it’s even better warmed through.
The method is simple: caramelize the onions slowly, brown the squash a bit so it gets some caramel flavor too, then simmer everything together until the flavors meld.
Because I like some texture in my sauces, I partially mash a few of the squash pieces and then puree about half the pot. Returning that smooth puree to the remaining chunky sauce gives the ideal consistency — silky but with little bits of squash for interest. That step was the key for me.
Think of it as a squash-forward marinara — hearty without being meaty. If you want to add mushrooms for extra earthiness you can, but they’ll change the flavor profile. Paired with a glass of red wine, this is exactly what dinner should be in October.
Harvest Squash Pasta Sauce
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Ingredients
- 1 tablespoon olive oil
- 2 tablespoons unsalted butter
- 1/2 red onion, diced
- 1/2 teaspoon salt
- 1/2 teaspoon cracked black pepper
- 3 garlic cloves, minced
- 2 cups cubed butternut squash
- 1 tablespoon chopped fresh sage
- 1 tablespoon tomato paste
- 1 14 ounce can fire-roasted diced tomatoes
- 1 1/2 cups low-sodium chicken stock
- 3 tablespoons pumpkin puree
- 1/4 teaspoon allspice
- pinch freshly grated nutmeg
- 1/3 cup heavy cream
- 1/3 cup freshly grated parmesan cheese
Instructions
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Heat a large pot over low heat and add the olive oil and butter. Once melted, stir in the diced onion, salt and pepper. Cook, stirring often, for 20 to 30 minutes until the onion is deeply caramelized. Add the garlic, cubed squash and fresh sage, and continue to cook until the squash begins to soften and develop some caramelized edges, about 10 to 12 minutes.
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Stir in the tomato paste and cook for 5 more minutes. Add the fire-roasted diced tomatoes, chicken stock, pumpkin puree, allspice and nutmeg. Bring to a gentle simmer, cover, and let simmer for 30 minutes to meld the flavors and soften the squash.
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Stir in the cream and simmer for an additional 15 minutes. For texture, either use an immersion blender to puree part of the sauce, or transfer half the mixture to a blender and puree until smooth before returning it to the pot.
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Once combined, stir in the parmesan cheese and cook another 10 to 15 minutes to thicken and finish the sauce.
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Taste and adjust seasoning with additional salt and pepper as needed. Serve hot over your favorite pasta and enjoy.
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Happiest little pumpkin ever.