I have had this spaghetti squash sitting on my country since winter, so it is safe to say that spaghetti squash stored in a cool dry place can last for up to 3 months, once it doesn’t have any soft spots.
I was amazed how easy it was to be prepared in my Instant Pot, taking only 10 minutes once the pressure cooker comes to pressure. If you want to prepare your spaghetti squash the traditional way baking or steaming it in an oven, it takes about 50 minutes, check out my Southwestern Stuffed Spaghetti Squash Recipe.
It is amazing how this simple squash has these strands like spaghetti when cooked. The delicate flavor of the spaghetti squash also known as noodle squash and vegetable marrow is the perfect base for adding your favorite sauces.

How To Cook Spaghetti Squash In Instant Pot?
To cook spaghetti squash in an Instant Pot, I have a 6 quart Instant Pot so make sure that your squash isn’t too large to fit in your pressure cooker. 3-pound spaghetti squash was able to fit perfectly in the insert of my Instant Pot.
- Wash and dry your spaghetti squash, using a sharp knife, cut your squash lengthwise in half. Due to the size of my squash, that was the best way to cut my squash. If your spaghetti squash is around 2 pounds or less you can cut yours horizontally.
- Using a spoon, scoop out the seeds in the middle of your spaghetti squash, you can save them to plant if you have a garden. If not discard.
- Put a steam basket or trivet at the bottom of the Instant Pot, add 1 cup of water. Place the two halves of the spaghetti squash side by side on top of the trivet or steam basket.
- Secure the lid on the Instant Pot, turn the Pressure Release knob to the Sealing position. Press the Pressure Cook/Manual setting and set the cooking time for 10 minutes. (It takes about 10 minutes for the Instant Pot to come to pressure).
- Do a quick release after the timer beeps by turning the kob to Venting. I usually cover the steam release valve with a damp kitchen towel to stop the steam from ruining my ceiling. This method is great for stopping the cooking process. Once the Floating Valve (metal pin) drops you can open the lid.
- Carefully remove the spaghetti squash halves, using an oven mitt to transfer onto a cutting board. Using a fork, separate the flesh of the squash into strands. You have the option of adding your sauce or dressing in the shell of the squash or transfer the strands to a serving bowl or plate and discarding the skin.
- Cook spaghetti squash should last 3-5 days in a covered container in the refrigerator. I served mine as a vegan garlic parmesan spaghetti squash.

Frequently Asked Questions About Spaghetti Squash
How do you know when spaghetti squash goes bad?
Make sure the skin isn’t dull having dark or brown spots with soft flesh when pressed. When you cut the squash open the flesh should be firm, it shouldn’t be pulling away from the outer skin and the flesh should not be soft.
Smell the spaghetti squash and make sure there is no bad smell of rotting vegetable.
What is the easiest way to cut a spaghetti squash?
Place your squash on a cutting board, you can put a damp dishcloth, paper towel or rubber mat beneath your cutting board to stabilize the cutting board and keep it from moving. Using a sharp knife, cut your squash lengthwise, along the middle.
What goes with spaghetti squash?
- Alfredo Sauce – Vegan Alfredo Sauce
- Cheese Sauce – Vegan Cheese Sauce
- Vegan Pesto Sauce – Vegan Kale Pesto
- Bolognese – Vegan Bolognese
Is spaghetti squash healthy?
- Low-calorie spaghetti squash is a good source of Vitamin A, which is beneficial for eye health.
- It also has a high level of Vitamin C, which is beneficial for cell repair.
- It is a great source of calcium which is great for bone health.
- Contains omega 3 fatty acids, which reduces inflammation in the body.
- It contains a good amount of folate, which is beneficial for heart health.
- Read More.
Categories
- Categories: Gluten-Free, Instant Pot, Vegan
- Course: Main Course
- Cuisine: American
Nutrition
(Per serving)- Energy: 51 kcal / 213 kJ
- Fat: 3 g
- Protein: 1 g
- Carbs: 6 g
Cook Time
- Preparation: 5 min
- Cooking: 10 min
- Ready in: 25 min
- For: 5 Servings
Ingredients
- 1 spaghetti squash
- 1 tablespoon olive oil
- 2 cloves garlic, minced
- 1/2 teaspoon salt
- vegan Parmesan, *link to the recipe
- fresh parsley chopped
Instructions
- Using a sharp knife, cut your squash lengthwise in half. Due to the size of my squash, that was the best way to cut my squash. If your spaghetti squash is around 2 pounds or less you can cut yours horizontally.
- Using a spoon, scoop out the seeds in the middle of your spaghetti squash, you can save them to plant if you have a garden. If not discard.
- Put a steam basket or trivet at the bottom of the Instant Pot, add 1 cup of water. Place the two halves of the spaghetti squash side by side on top of the trivet or steam basket.
- Secure the lid on the Instant Pot, turn the Pressure Release knob to the Sealing position. Press the Pressure Cook/Manual setting and set the cooking time for 10 minutes. (It takes about 10 minutes for the Instant Pot to come to pressure).
- Do a quick release after the timer beeps by turning the kob to Venting. I usually cover the steam release valve with a damp kitchen towel to stop the steam from ruining my ceiling. This method is great for stopping the cooking process. Once the Floating Valve (metal pin) drops you can open the lid.
- Carefully remove the spaghetti squash halves, using an oven mitt to transfer onto a cutting board. Using a fork, separate the flesh of the squash into strands. You have the option of adding your sauce or dressing in the shell of the squash or transfer the strands to a serving bowl or plate and discarding the skin.
To Make Garlic Parmesan Spaghetti Squash
- Heat oil in a skillet over medium-high heat, add garlic and cook for 1-minute stirring constantly. Pour garlic oil over spaghetti squash, add salt, vegan parmesan, and parsley. Toss to coat spaghetti and serve.
I did spaghetti squash in my pressure cooker the last time I cooked it and was amazed at how easy and Quick! Like you said 10 min. and it’s done! Now I can do it in the summer without hearing up the kitchen. I will try your recipe next time. We like it with meatless spaghetti sauce, served with breaded veal patties. Thanks for the recipe, always looking for new ways to fix it.
This was so easy to do, it was my first time cooking this squash.
I’m happy it turned out great for you Gwendolyn, thank you for your feedback.