Instant Pot Skinny Spaghetti
I make this Instant Pot Skinny Spaghetti when I want a no-fuss weeknight dinner that feels like something I ordered out but took half the time to pull together. It’s honest food: lean protein, whole-grain pasta, bright tomatoes, and a tomato sauce that clings to every strand. No babysitting at the stove, and cleanup is delightfully small.
This recipe trusts the Instant Pot to do the heavy lifting. You brown the turkey sausage first for flavor, then layer the pasta and liquids so it cooks evenly. The result is saucy, tender spaghetti with less oil, less time, and all the comfort.
If you’re comfortable with one-pot meals and want reliable results, this is worth bookmarking. I’ll walk you through what each ingredient does, the exact steps, and sensible troubleshooting so you get great spaghetti every time.
Ingredient Notes
Ingredients
- 1 pound ground turkey sausage — provides the primary savory, seasoned protein; browning it first builds flavor.
- 1 pound whole-wheat spaghetti pasta — the backbone of the dish; whole-wheat holds up well under pressure and adds fiber.
- 24 ounces marinara sauce jar, no sugar added — concentrated tomato flavor and seasoning; using a no-sugar-added jar keeps sweetness balanced.
- 4 cups water — the cooking liquid that hydrates the pasta and thins the sauce for even pressure cooking.
- 15 ounces diced tomatoes can — adds texture and extra tomato brightness; include the juices for steam and flavor.
Stepwise Method: Instant Pot Skinny Spaghetti
- Set the Instant Pot to Sauté. Add 1 pound ground turkey sausage and cook, breaking it into small pieces, until browned and no longer pink.
- Use a slotted spoon to transfer the cooked sausage to a plate and pour out or carefully drain any excess liquid from the inner pot; return the sausage to the pot.
- Break 1 pound whole-wheat spaghetti pasta in half and add the pieces to the Instant Pot in an even layer.
- Pour in the 24 ounces marinara sauce, 4 cups water, and the 15 ounces diced tomatoes (with their juices). Push the pasta down so it is completely covered by the liquids; do not stir vigorously.
- Close the lid, set the steam release to Sealing, and set the Instant Pot to Manual/High Pressure for 8 minutes.
- When the cook time ends, perform a quick (manual) release by moving the steam release to Venting; when the float valve drops, open the lid.
- Stir the spaghetti and sauce well to combine. Let sit 1–2 minutes to allow the sauce to thicken slightly, then serve hot.
Why It’s My Go-To
This recipe balances speed, health, and comfort. Ground turkey sausage keeps the dish leaner than pork sausage but still gives you that savory, seasoned punch. Whole-wheat spaghetti adds texture and fiber, so the meal satisfies without feeling heavy.
It’s also dependable. Once you layer the pasta and liquids properly, the Instant Pot cooks consistently. There’s no frantic stirring or timing pasta on the stove. For busy evenings, it delivers takeout vibes without the extra sodium and added calories.
No-Store Runs Needed
You likely already have everything to make this. The protein, pasta, marinara, canned tomatoes, and water are pantry fundamentals. If you keep a frozen or fresh protein and a jar of sauce, this is a fast assembly. No last-minute trips to the store for odd ingredients or garnishes required.
Equipment at a Glance
- 6-quart (or larger) electric pressure cooker / Instant Pot
- Slotted spoon (for removing cooked sausage)
- Plate or bowl (to hold the cooked sausage temporarily)
- Wooden spoon or heatproof spatula (for final stirring)
- Optional: tongs for testing strands and serving
Things That Go Wrong
Sticking or burned-on rice-style messages: if you get a “burn” notice, it’s usually because the bottom had concentrated sauce or browned bits that weren’t deglazed enough. Browning the sausage is important, but scrape up any bits and make sure the pasta isn’t packed too tightly on the bottom before adding liquid.
Pasta clumps after cooking: if the pasta wasn’t pushed down to be completely covered by liquid, it can cook unevenly and clump. Also avoid vigorous stirring before pressure — that causes starchy paste to form on the bottom.
Undercooked pasta: whole-wheat spaghetti can be denser than regular pasta. If you consistently find it undercooked, try an extra minute under pressure next time, or let it rest in the hot pot a few more minutes after opening.
Too much liquid / watery sauce: the recipe accounts for some thinning while pressure cooking. If yours is too thin after the final stir, allow it to sit uncovered for 2–3 minutes; the heat will reduce it. You can also remove the lid and hit Sauté for 1–2 minutes, stirring constantly to thicken.
Tailor It to Your Diet
Lower sodium: choose a low-sodium or no-salt-added marinara and canned tomatoes. That will let the sausage seasoning come through without overdoing the salt.
Vegetarian or vegan: remove the sausage and use a plant-based sausage alternative or hearty vegetables (mushrooms, eggplant, zucchini) sautéed first. If using a plant-based sausage, check the package for recommended cook times and fat release; treat it similarly to the turkey sausage in step 1.
Gluten-free: swap the whole-wheat spaghetti for a gluten-free spaghetti that cooks under pressure. Note that cook times vary by pasta type; follow manufacturer recommendations for pressure pasta when available and be prepared to adjust resting time.
Higher protein / lower carb: reduce the pasta by half and double the sausage or add cooked legumes after pressure cooking. Keep in mind the liquid ratio will change if you alter the pasta amount, so cook times and textures may need small tweaks.
Insider Tips
Break the spaghetti in half before adding. It fits better in the pot and cooks more evenly. Push the pasta down so it’s fully submerged, but don’t stir hard — a gentle press is enough.
Brown the turkey sausage well. That step gives you caramelized bits and depth of flavor you wouldn’t get if you dumped raw sausage in with the sauce. Use a slotted spoon to remove the sausage so excess fat or liquid can be drained, which prevents a burned-bottom notice.
Resist stirring vigorously after adding the liquids. That starchy paste on the bottom is the enemy. Layering and gentle pressing avoid that problem.
Quick release carefully. Steam will erupt; use a long utensil or the Instant Pot-approved tool and stand back. Once the float valve drops, open the lid away from your face to avoid steam.
Let it rest 1–2 minutes after stirring. The sauce will thicken slightly and coat the pasta better. It improves texture and keeps the dish from feeling soupy.
Storing Tips & Timelines
Refrigerator: Seal cooled leftovers in an airtight container for up to 4 days. The sauce will continue to firm up in the fridge, so when reheating add a splash of water or a tablespoon of broth to loosen it before microwaving or reheating on the stove.
Freezer: Freeze in portioned airtight containers for up to 3 months. Thaw overnight in the refrigerator before reheating. If you’re freezing, separate into meal-sized portions so you only defrost what you need.
Reheating: Reheat gently on the stovetop over medium-low with a splash of water, stock, or milk (dairy or plant) to restore creaminess. In the microwave, cover and reheat in 1-minute intervals, stirring in between to distribute heat evenly.
Ask the Chef
Q: Can I use a different type of sausage?
A: Yes. Swap in any ground or crumbled sausage you prefer. If it’s fattier (pork sausage), you may need to drain more liquid after browning to avoid a burn notice. If it’s a leaner or plant-based option, treat it the same as the turkey sausage and watch for dryness.
Q: Why break the spaghetti in half?
A: It helps fit the pasta in the Instant Pot so it layers evenly and hydrates properly. Long strands can stick up and not get submerged, which leads to uneven cooking.
Q: Can I add cheese or fresh herbs?
A: Absolutely. Stir in grated Parmesan or a handful of fresh basil or parsley after pressure cooking and stirring. Add these as a finishing touch so they don’t break down under high heat.
Q: What if my pasta is mushy?
A: That usually means it cooked too long or sat too long in hot liquid. Next time shorten the pressure time by a minute or let it sit uncovered for a bit after cooking to avoid carryover softening.
Before You Go
This Instant Pot Skinny Spaghetti is dependable, quick, and forgiving. It gives you a satisfying weeknight dinner without complicated steps or obscure ingredients. The method works because it focuses on building flavor early and trusting the pressure cooker to finish the job.
Give it a try as written the first time. Once you know how your Instant Pot and pasta respond, small adjustments—extra minute, slightly less liquid, or a switch of protein—are easy. If you make it, I’d love to hear what you swapped or how it came out. Happy cooking—and here’s to more simple, delicious dinners.
Instant Pot Skinny Spaghetti
Ingredients
Equipment
Method
- Set the Instant Pot to Sauté. Add 1 pound ground turkey sausage and cook, breaking it into small pieces, until browned and no longer pink.
- Use a slotted spoon to transfer the cooked sausage to a plate and pour out or carefully drain any excess liquid from the inner pot; return the sausage to the pot.
- Break 1 pound whole-wheat spaghetti pasta in half and add the pieces to the Instant Pot in an even layer.
- Pour in the 24 ounces marinara sauce, 4 cups water, and the 15 ounces diced tomatoes (with their juices). Push the pasta down so it is completely covered by the liquids; do not stir vigorously.
- Close the lid, set the steam release to Sealing, and set the Instant Pot to Manual/High Pressure for 8 minutes.
- When the cook time ends, perform a quick (manual) release by moving the steam release to Venting; when the float valve drops, open the lid.
- Stir the spaghetti and sauce well to combine. Let sit 1–2 minutes to allow the sauce to thicken slightly, then serve hot.
