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A square photo of caramelized onion tortellini pasta in a blue dutch oven with fresh parsley on top and a wooden spoon.

Cheese tortellini with caramelized onion sauce and mushrooms recipe

Cheese tortellini with caramelized onion sauce and mushrooms recipe! This simple and delicious vegetarian tortellini pasta has the most flavorful sauce you will ever taste. Your whole family will love this!
Course Main Course
Cuisine American, Italian
Keyword dinner, pasta, vegetarian
Prep Time 10 minutes
Cook Time 1 hour 15 minutes
Total Time 1 hour 25 minutes
Servings 5 servings
Calories 642kcal


  • 6 tablespoon salted butter
  • 4 tablespoon extra virgin olive oil
  • 2 ½ large yellow onions, sliced into ½" slices
  • 1 tablespoon sugar
  • 3 cloves garlic, minced
  • 6 cups sliced cremini mushrooms (about 10 mushrooms)
  • cup red wine vinegar
  • 20 ounces cheese tortellini
  • salt and pepper
  • about ¾ cup chopped fresh Italian parsley


  • Heat butter and oil in a large cast iron dutch oven over medium-high heat. Add onion and sugar and stir to combine. Cook for about 10 minutes, until onions are starting to brown. Give a good stir and reduce heat to medium. Continue to cook until onions are brown and caramelized, almost jammy (see pic), about an hour, stirring every 10 minutes. Be patient here! You want those onions to be brown and rich with flavor!
  • Meanwhile, cook tortellini according to package directions and set aside.
  • When the onions are caramelized, but not quite jammy yet (see pic), add the garlic and mushrooms. Give a good stir and cook another 10 minutes. Add the red wine vinegar, and cook about 5 minutes, stirring occasionally.
  • Remove the sauce from the heat and toss in the tortellini. Season with salt and pepper and add most of the parsley, leaving some for serving. Toss all together and serve, topping with additional fresh parsley.


Serving: 1cup | Calories: 642kcal | Carbohydrates: 63g | Protein: 22g | Fat: 35g | Saturated Fat: 13g | Cholesterol: 79mg | Sodium: 623mg | Potassium: 483mg | Fiber: 7g | Sugar: 11g | Vitamin A: 420IU | Vitamin C: 9mg | Calcium: 188mg | Iron: 4mg