Creamy Brie Spaghetti Squash with Balsamic Onions and Crispy Prosciutto

Hello Creamy Brie Spaghetti Squash with Balsamic Onions and Crispy Prosciutto. It’s a mouth full, but I just couldn’t title it any other way. Each element of flavor really brings something unique and necessary to this dish. Spaghetti squash has become a bi-weekly staple in our house. I even buy it when it’s out of season. It’s so easy to make and can take on any flavors you like.

The squash by itself does not have a ton of flavor which is why it’s the perfect canvas for any flavors you like. I use it in place of spaghetti noodles all the time. It’s great with simple marinara and I almost always have my All Purpose Meatballs on hand. It also makes a very simple side with pesto and Parmesan cheese, try this simple recipe here.

Putting it all together

I roast the squash until the edges are brown and it’s soft inside. It should just pull away from the outer layer very easily with a fork, and look like little noodles.

The onions cook down to almost a caramelized state. They get translucent, soft, and sweet, and by adding the balsamic vinegar they get a nice little tang to go alongside the sweetness. Delicious! They would also be very good on a burger if you feel like making extra! DO IT!

The prosciutto gets nice and crispy in the oven. Forming it into nests as pictured prevents it from over cooking and burning because its so thin. The nests get browned and crispy and is the perfect salty, crunchy addition to this creamy dish. You could also use bacon, that would be really delicious too.

I serve this as a meal on it’s own, but is also a great side dish. The creamy brie sauce doesn’t exactly become a smooth creamy sauce as you might get from other cheese sauces, but once you melt it all together with the squash and onions, it really becomes a smooth delicious consistency!

Hope you enjoy! I’d love your feedback once you’ve made it!

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Creamy Brie Spaghetti Squash with Balsamic Onions and Crispy Prosciutto

Course Main Course, Side Dish
Total Time 1 hour 10 minutes
Servings 4
Author Laura Doerr


  • 2 small spaghetti squash
  • drizzle olive oil
  • salt and pepper
  • 3 oz prosciutto

For the onions

  • 2 yellow onions sliced
  • 2 tbsp olive oil
  • salt and pepper
  • 3 tbsp balsamic vinegar

For the cheese sauce

  • 6 oz brie cheese rind trimmed, cubed
  • 2 cloves garlic minced
  • 2 tbsp butter
  • 2 tbsp flour
  • 3/4 cup milk
  • salt and pepper
  • 1 tbsp fresh chopped parsley
  • red pepper flakes optional


For the squash

  1. Preheat oven to 400 degrees. Cut the spaghetti squash in half lengthwise, and remove the center seeds and guts. Drizzle with olive oil and season with salt and pepper. Place face down on a large baking sheet lined with foil. Bake for about 45 minutes or until tender and slightly browned on the edges.

  2. Remove from oven. Using a thongs and fork, scrape out the squash and place into a bowl and set aside.

For the prosciutto

  1. Line a large baking sheet with parchment paper. Form each slice of prosciutto into a nest on the baking sheet. Bake in the 400 degree oven after squash is done for 10-15 minutes, or until it begins to crisp. Watch closely so it does not burn. Chop or break into chunks.

For the balsamic onions

  1. While the squash is roasting, slice the onions and place in a large skillet with olive oil. Season with salt and pepper. Cook on medium for about 30 minutes, stirring occasionally. After 30 minutes the onions should be slightly browned and cooked. Stir in 1 tbsp of balsamic vinegar. Once it is reduced add in another tbsp, and repeat one more time after that, totaling 3 tablespoons. Remove onions from pan and onto a plate, set aside.

For the cheese sauce

  1. Using the same skillet you cooked the onions in (that have been removed), add the butter and minced garlic over medium heat, whisk for about 2 minutes. Whisk in the flour and cook for another 2 minutes. It will be a bubbly paste. Slowly whisk in the milk. It should thicken quite fast, add in the brie cheese. Whisk until all of the cheese is melted. It may look like a gloppy cheesy blob, but that's OK!

To put it all together

  1. Add the spaghetti squash into the cheese sauce. Stir to coat all the squash. Stir in the balsamic onions. Season with salt and pepper to taste. Add some red pepper flakes for an added kick. Top each serving with crumbled crispy prosciutto and fresh parsley. Enjoy!

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