Slow Cooker Spaghetti Squash Recipe

This Slow Cooker Spaghetti Squash is an easy, mostly hands-off recipe ideal for busy weeknights. Whole spaghetti squash slow-cooks until tender, then the strands are tossed with butter and Parmesan for a simple, flavorful vegetable side or light main that the whole family will enjoy.

Slow cooker spaghetti squash served up on a blue plate with some parsley for garnish.

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Spaghetti squash is a versatile, lower-carb alternative to pasta that can be prepared as a main course or a side dish. Many people avoid it because cutting through its tough skin feels intimidating; this recipe sidesteps that problem by cooking the squash whole in the slow cooker. Cooking the squash intact makes it much easier to halve, scoop the seeds, and pull the flesh into long, noodle-like strands once it’s tender.

Using the slow cooker also frees you from standing over the stove — set it in the morning or before work and come back to perfectly cooked squash. A few simple additions — butter, grated Parmesan, salt, and pepper — transform the squash into a creamy, savory dish that pairs well with many meals.

Ingredients

These are the straightforward ingredients you’ll need for slow cooker spaghetti squash:

1 medium spaghetti squash (leave whole)
2 tablespoons butter (salted or unsalted, to taste)
1/4 cup grated Parmesan cheese (freshly grated preferred)
Salt and pepper, to taste
Fresh parsley, chopped, for garnish

See the recipe card below for serving size, nutrition, and step-by-step instructions.

Variations

Vegan / dairy-free: Substitute butter with olive oil or a dairy-free spread and omit the Parmesan or use a plant-based alternative.
Seasoning options: Add garlic powder, onion powder, Italian seasoning, or red pepper flakes for extra flavor.
Herb swaps: Replace parsley with basil, thyme, or rosemary for a different herbal profile.
Different cheeses: Swap Parmesan for Romano, Asiago, or Grana Padano if you prefer a different savory note.

How to Make Slow Cooker Spaghetti Squash

Follow these simple steps to prepare the squash. Start by rinsing the exterior and drying it well.

Spaghetti squash in the slow cooker poked with holes.

Step 1: Prep the squash. Pierce the skin several times with a knife or fork to allow steam to escape.

Spaghetti squash in the slow cooker after it's cooked.

Step 2: Cook the squash. Place the whole squash in the slow cooker. Cook on low for 6–8 hours or on high for 3–4 hours, until the squash is tender when pressed.

Spaghetti squash laid on a wooden cutting board and a spoon removing the seeds.

Step 3: Cut and seed. Carefully remove the hot squash from the slow cooker, cut it in half lengthwise, and scoop out the seeds.

Spaghetti squash with the insides pulled loose into strands of squash.

Step 4: Scrape into strands. Use a fork to scrape the flesh into strands that resemble spaghetti.

All the other ingredients added to season the cooked spaghetti squash.

Step 5: Finish and serve. Transfer the strands to a serving bowl. Stir in butter, grated Parmesan, salt, and pepper. Garnish with chopped parsley and serve warm.

Serving Suggestions

Slow cooker spaghetti squash is versatile and pairs well with many dishes. Try these ideas:

Top with marinara sauce and meatballs for a lighter version of spaghetti and meatballs.
Toss with pesto (traditional or nut-based) and sprinkle with toasted pine nuts for texture.
Serve alongside roasted or grilled chicken for a complete meal.
Use it in place of pasta in dishes like tacos or casseroles to reduce carbs.

A close up of crockpot spaghetti squash on a plate.

Expert Tips

Choose the right slow cooker: A 4-quart or larger slow cooker ensures the squash fits with the lid closed.
Keep the lid closed: Avoid opening the slow cooker while it’s cooking so the temperature stays consistent and the squash cooks evenly.
Storage: Store leftovers in an airtight container in the refrigerator for 3–4 days. Reheat gently to avoid drying out the strands.

Recipe FAQs

How do I know when my spaghetti squash is done?
The squash is done when the skin gives slightly when pressed. Use the back of a spoon or a towel to test carefully, as the squash will be hot.

Do I need to cut spaghetti squash before cooking?
No—this recipe is designed to cook the squash whole, which makes it easier to handle and shred once cooked.

When is spaghetti squash in season?
Spaghetti squash is typically in season from early fall through winter, but it is widely available year-round at many grocery stores.

A fork twirling some of the spaghetti squash up with the plate in front of a crockpot.

More Slow Cooker Recipes

Slow Cooker Cabbage Roll Soup
Slow Cooker Jalapeño Popper Dip
Slow Cooker Mushrooms
5-Ingredient Slow Cooker Chicken Legs

Did you try this recipe? Please leave a star rating and a review where you found the recipe, and share your photos on social media — it’s always great to see how your version turned out!

Slow Cooker Spaghetti Squash – Recipe Card

Servings: 4 | Prep time: 10 minutes | Cook time: 6–8 hours (low) or 3–4 hours (high)

Ingredients

1 medium spaghetti squash
2 tablespoons butter
1/4 cup grated Parmesan cheese
Salt and pepper, to taste
Fresh parsley, chopped, for garnish

Instructions

Wash and dry the spaghetti squash. Pierce the skin several times with a fork or knife.
Place the whole squash in the slow cooker. Cook on low for 6–8 hours or on high for 3–4 hours, until tender.
Carefully remove the hot squash, cut it in half lengthwise, and scoop out the seeds.
Use a fork to scrape the flesh into strands, discarding the skin.
In a serving bowl, combine the squash strands with butter, Parmesan, salt, and pepper. Garnish with parsley and serve warm.

Notes

Use a 4-quart (or larger) slow cooker so the squash fits comfortably.
Keep the lid closed while cooking for best results.
Leftovers keep 3–4 days refrigerated in an airtight container.

Nutrition (per serving)