Why You’ll Love This Recipe

I love how this pasta combines sweet, salty, savory, and creamy flavors. Butternut squash gives me a naturally smooth sauce with subtle sweetness, while miso adds enough savory depth to keep the finished dish balanced.

I also like that the creamy texture does not require heavy cream. I use eggs, cheese, squash, and starchy pasta water to create a glossy sauce that clings to every strand of pasta.

This recipe is also easy for me to customize. I can add mushrooms or greens, adjust the amount of miso, or finish the pasta with chili flakes when I want a little heat.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Spaghetti, bucatini, or linguine
Butternut squash, peeled and cubed
White or yellow miso paste
Large eggs
Egg yolks
Parmesan or Pecorino Romano cheese, finely grated
Garlic
Olive oil
Freshly ground black pepper
Salt
Reserved pasta cooking water
Fresh parsley or chives, optional for serving
Red pepper flakes, optional for serving

Directions

I start by preheating my oven to 425°F (220°C). I toss the cubed butternut squash with olive oil and a little salt, then spread it in a single layer on a baking sheet. I roast the squash until it is very tender and lightly caramelized around the edges.

While the squash roasts, I bring a large pot of salted water to a boil. I cook the pasta until just al dente, making sure I reserve a generous amount of starchy pasta water before draining.

I transfer the tender roasted squash to a blender and add the miso, garlic, and a splash of warm pasta water. I blend until completely smooth, adding a little more pasta water when necessary to create a creamy consistency.

In a separate bowl, I whisk together the eggs, egg yolks, finely grated cheese, and plenty of freshly ground black pepper.

I return the drained pasta to a large pan and add the butternut squash mixture. I toss everything together over low heat until the pasta is evenly coated, then I remove the pan from the heat.

I gradually add the egg and cheese mixture while tossing the pasta continuously. I make sure the pan is no longer over direct heat so the eggs create a silky sauce rather than scrambling.

I add reserved pasta water a little at a time until the sauce becomes smooth, glossy, and loose enough to coat the pasta.

I taste the pasta before adding extra salt because both miso and cheese are already salty. I finish each serving with additional grated cheese, freshly ground black pepper, and parsley, chives, or red pepper flakes if I want them.

Servings and Timing

I usually make this recipe for 4 servings. Roasting the squash takes most of the cooking time, but I prepare the pasta and remaining ingredients while it is in the oven.

Prep time: 15 minutes
Cook time: 35 minutes
Total time: 50 minutes
Servings: 4

Variations

For a vegetarian carbonara-style pasta, I make sure the hard cheese I choose is made without animal rennet. I can also use a suitable vegetarian hard-cheese alternative.

When I want extra vegetables, I add sautéed mushrooms, spinach, kale, or Brussels sprouts. I especially like mushrooms because their savory flavor complements both the miso and squash.

For extra heat, I add red pepper flakes, chili crisp, or a small amount of chili oil. I usually add spicy ingredients at the end so I can easily control the heat.

If I want a stronger miso flavor, I add a little more miso to the squash puree. I taste before adding more because the saltiness can vary considerably between different miso pastes.

I can also replace butternut squash with kabocha, pumpkin, or another sweet winter squash. I make sure whichever squash I choose is cooked until very tender so I can blend it into a smooth sauce.

Storage/Reheating

I store leftover Butternut Squash Miso Carbonara in an airtight container in the refrigerator for up to 3 days. I find the texture is best when the pasta is freshly prepared, but leftovers can still reheat well with a little care.

When reheating on the stovetop, I place the pasta in a skillet over low heat and add a splash of water. I stir gently until the pasta is heated through and the sauce becomes creamy again.

For the microwave, I add a small splash of water and reheat the pasta in short intervals, stirring between each interval. I avoid overheating it because excessive heat can make the egg-based sauce dry or grainy.

I generally do not freeze this carbonara because egg-and-cheese sauces can change texture after freezing and thawing.

FAQs

What does miso add to carbonara?

I use miso to add salty, fermented umami flavor. It complements the cheese and gives the sauce additional savory depth, which I find particularly useful for balancing the natural sweetness of butternut squash.

How do I keep the eggs from scrambling?

I remove the pan from direct heat before adding the egg and cheese mixture. I toss continuously and use warm pasta water to loosen the sauce. This gentle residual heat helps me create a creamy coating instead of scrambled eggs.

Can I make the butternut squash puree ahead of time?

Yes. I roast and blend the squash ahead of time, then refrigerate the puree in an airtight container. When I am ready to make the pasta, I gently warm the puree before combining it with the cooked pasta.

What type of miso works best for this recipe?

I usually choose white miso when I want a mild, slightly sweet flavor that does not overpower the squash. Yellow miso also works when I want a somewhat deeper and more pronounced savory flavor.

Can I make Butternut Squash Miso Carbonara without a blender?

Yes. I cook the squash until extremely tender and mash it thoroughly with a fork or potato masher. For the smoothest possible sauce without a blender, I can also press the cooked squash through a fine-mesh sieve before combining it with the other ingredients.

Conclusion

Butternut Squash Miso Carbonara is a cozy pasta recipe I enjoy when I want something creamy, savory, and a little different from traditional carbonara. The combination of sweet roasted squash, umami-rich miso, eggs, cheese, and black pepper gives me a silky sauce with layers of flavor.

Butternut Squash Miso Carbonara

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A creamy carbonara-inspired pasta with sweet roasted butternut squash, savory miso, eggs, cheese, and plenty of black pepper. The silky squash sauce creates a rich and comforting pasta without the need for heavy cream.

Author: Laura
Prep Time: 15 minutes
Cook Time: 35 minutes
Total Time: 50 minutes
Yield: 4 servings
Category: Main Course
Method: Roasting and Stovetop
Cuisine: Italian-Japanese Fusion
Diet: Vegetarian

Instructions

Preheat the oven to 425°F (220°C). Toss the cubed butternut squash with olive oil and a little salt, then spread it in a single layer on a baking sheet. Roast until very tender and lightly caramelized around the edges.
While the squash roasts, bring a large pot of salted water to a boil. Cook the pasta until just al dente, reserving a generous amount of starchy pasta cooking water before draining.
Transfer the roasted squash to a blender. Add the miso, garlic, and a splash of warm pasta water. Blend until completely smooth, adding more pasta water as needed to create a creamy puree.
In a separate bowl, whisk together the eggs, egg yolks, finely grated cheese, and plenty of freshly ground black pepper.
Return the drained pasta to a large pan and add the butternut squash mixture. Toss over low heat until the pasta is evenly coated, then remove the pan from direct heat.
Gradually add the egg and cheese mixture while continuously tossing the pasta so the residual heat creates a silky sauce without scrambling the eggs.
Add reserved pasta cooking water a little at a time while tossing until the sauce is smooth, glossy, and loose enough to coat the pasta evenly.
Taste before adding additional salt because the miso and cheese are already salty. Serve with additional grated cheese, freshly ground black pepper, and optional parsley, chives, or red pepper flakes.

Notes

For a vegetarian version, use Parmesan, Pecorino-style cheese, or another hard cheese made without animal rennet.
Add sautéed mushrooms, spinach, kale, or Brussels sprouts for extra vegetables.
For additional heat, finish the pasta with red pepper flakes, chili crisp, or chili oil.
White miso provides a mild, slightly sweet flavor, while yellow miso gives the sauce a somewhat deeper savory flavor.
Kabocha, pumpkin, or another sweet winter squash can replace the butternut squash.
Remove the pan from direct heat before adding the egg mixture and toss continuously to prevent the eggs from scrambling.
Store leftovers in an airtight container in the refrigerator for up to 3 days.
Reheat gently over low heat with a splash of water to help restore the creamy consistency.
Freezing is not recommended because the egg-and-cheese sauce can change texture after thawing.

Nutrition

Serving Size: 1 serving
Calories: 590 kcal
Sugar: 7 g
Sodium: 880 mg
Fat: 22 g
Saturated Fat: 8 g
Unsaturated Fat: 13 g
Trans Fat: 0 g
Carbohydrates: 75 g
Fiber: 7 g
Protein: 23 g
Cholesterol: 225 mg