Instant Pot Spaghetti Recipe: One-Pot Weeknight Magic in 20 Minutes

This one-pot method delivers perfectly cooked spaghetti with rich, meaty sauce in 20 minutes—no boiling, no draining, no extra dishes.

I developed this technique after too many nights of watching pasta water boil over while sauce simmered separately. The Instant Pot combines both steps, infusing the noodles with flavor as they cook in the sauce.

You’ll get al dente pasta coated in a restaurant-quality tomato base, with ground beef that’s tender and fully incorporated. The results are consistent every time, with minimal effort and maximum payoff.

Ideal for busy weeknights when you need dinner on the table fast. Here’s how to make it.

Ingredients for Instant Pot Spaghetti

Pantry staples plus ground beef. One pot, twenty minutes, dinner done.

The ground beef is doing heavy lifting here. 80/20 blend gives you the right fat for flavor without greasy results. Grab it from Costco or your regular supermarket—just avoid the ultra-lean stuff. The pasta? Any spaghetti works, but Barilla or De Cecco hold up best to pressure cooking (don’t break them too small). For the marinara, Rao’s or Victoria are restaurant-quality in a jar.

No ground beef? Ground turkey or Italian sausage work great—just drain excess fat. Vegetarian? Lentils or crumbled tofu soak up that sauce nicely. Short on marinara? Crushed tomatoes plus Italian seasoning gets you close. The broth can be swapped for water in a pinch (but the beef broth really amps up the flavor).

Leftovers keep 4-5 days in the fridge, reheat with a splash of water. Freeze portions for up to 3 months (thaw overnight before reheating). The sauce thickens as it sits—perfect for next-day lunches.

Step-by-Step Instructions for Instant Pot Spaghetti

This one-pot method delivers perfect pasta every time with minimal cleanup.

Step 1: Sauté the Aromatics and Ground Beef

Set your Instant Pot to Sauté mode on Normal heat. Add the 2 tbsp Extra-Virgin Olive Oil and swirl to coat the bottom. Toss in the diced 1 whole Yellow Onion and cook for 3 minutes until it turns translucent and starts to soften.

Add the 1 lb Ground Beef, breaking it up with a wooden spoon. Cook for 5-6 minutes until the beef is fully browned with no pink remaining. Stir in the minced 4 cloves Garlic Cloves and cook for 30 seconds until fragrant—don’t let it burn.

Step 2: Deglaze and Add Liquids

Pour in 1 cup of the 2 cups Beef Broth and use your spoon to scrape up all those flavorful browned bits from the bottom of the pot. This step is crucial for preventing the “burn” notice and infusing your dish with deep, savory flavor.

Add the remaining 1 cup Beef Broth, the 24 oz Marinara Sauce, 1.5 cups Water, 1 tsp Dried Oregano, 1 tsp Dried Basil, 0.5 tsp Crushed Red Pepper Flakes, 1 tsp Kosher Salt, and 0.5 tsp Black Pepper. Stir everything together until well combined.

Step 3: Add Pasta and Pressure Cook

Break the 8 oz Spaghetti Noodles in half and arrange them in the pot, submerging them as much as possible in the liquid. Some may stick up—that’s fine. Make sure no noodles are stuck to the sides above the liquid line.

Secure the lid, set the valve to Sealing, and cook on High Pressure for 8 minutes. The pot will take about 10-12 minutes to come to pressure before the timer starts. Once done, let the pressure release naturally for 5 minutes, then quick-release any remaining pressure.

Step 4: Finish and Serve

Carefully open the lid and stir the spaghetti. If it seems too thick, add a splash of hot water to loosen the sauce. The noodles should be tender but still have a slight bite—if they’re not quite done, let them sit in the hot liquid for another 2-3 minutes.

Taste and adjust seasoning if needed. Serve immediately in bowls, topped with 0.5 cup Grated Parmesan Cheese if desired. The pasta will thicken as it sits, so add a little extra liquid if serving later. This dish reheats beautifully, making it perfect for meal prep.

Pro Cooking Tips for This Recipe

Prevent the Burn Notice

Always deglaze the pot thoroughly after browning the 1 lb Ground Beef. I use 1 cup of the 2 cups Beef Broth to scrape up every browned bit. Skipping this step is the most common cause of the dreaded burn notice on your Instant Pot. 💡

Perfect Pasta Texture

Break the 8 oz Spaghetti Noodles precisely in half and submerge them completely. If you use whole noodles, they’ll clump and cook unevenly. For al dente results, don’t exceed the 8-minute pressure cook time.

Liquid Ratios Matter

The 1.5 cups Water plus 2 cups Beef Broth is non-negotiable for this recipe. Too little liquid and you risk burning; too much and your sauce will be watery. I measure with a Pyrex measuring cup for accuracy.

Natural Release Secret

Let the pressure release naturally for the full 5 minutes after cooking. This allows the pasta to finish absorbing liquid. Quick-releasing immediately can leave your noodles undercooked and the sauce too thin.

Sauce Consistency Fix

If your sauce seems too thick after cooking, stir in ¼ cup hot water at a time. The pasta continues to absorb liquid as it sits, so I always keep a kettle of hot water ready for adjustments.

Cleanup Pro Tip

After serving, fill the Instant Pot liner with warm soapy water immediately. The sauce will loosen right up with a 10-minute soak, saving you from scrubbing dried-on tomato residue later. 🔥

Frequently Asked Questions