Go Back
–+ servings

Slow Cooker Caramelized Onions Pasta

No ratings yet
A rich, comforting pasta dish featuring deeply caramelized onions cooked low and slow in a slow cooker. Blended with garlic, herbs, and Parmesan, this dish is packed with sweet and savory flavor, perfect for an easy weeknight meal or cozy weekend dinner.
Print Recipe Pin Recipe

Want This Recipe Later?

We'll send this recipe straight to your inbox.

Prep Time 15 minutes
Cook Time 10 hours
Total Time 10 hours 15 minutes
Course Comfort Food, Main Course, Slow Cooker Meals, Vegetarian Option
Cuisine American, Italian-Inspired
Servings 4 servings
Calories 695 kcal

Ingredients
  

  • 4 large yellow onions thinly sliced
  • 3 tbsp olive oil or unsalted butter
  • 1 tsp salt
  • 1 tsp sugar optional, for extra sweetness
  • 4 cloves garlic minced
  • 1/2 tsp dried thyme
  • 1/2 tsp dried rosemary
  • 1/4 cup dry white wine or vegetable broth
  • 1 lb pasta such as spaghetti, fettuccine, or penne
  • 1/2 cup Parmesan cheese grated
  • fresh parsley chopped, for garnish
  • salt and pepper to taste

Instructions
 

  • Begin by thinly slicing your onions. This might take a little time, but the effort is well worth it.
  • Add the sliced onions to your slow cooker, followed by the olive oil or butter, salt, and optional sugar. Stir to combine well.
  • Cover and cook on low for about 8-10 hours, stirring occasionally, until the onions are deeply golden and caramelized.
  • About 30 minutes before the onions are done, stir in the minced garlic, thyme, rosemary, and white wine or vegetable broth. Continue cooking until the mixture is aromatic and well combined.
  • Meanwhile, cook your pasta according to the package directions. Reserve a cup of the starchy pasta water before draining.
  • Combine the caramelized onions with the cooked pasta, adding reserved pasta water as needed to create a silky sauce.
  • Stir in the grated Parmesan cheese and season with salt and pepper to taste.
  • Garnish with freshly chopped parsley and serve immediately.

Notes

For extra flavor, try adding a splash of balsamic vinegar or a pinch of chili flakes to the onions before serving. Leftovers store well and taste even better the next day.

Nutrition

Serving: 1servingsCalories: 695kcalCarbohydrates: 112.5gProtein: 20gFat: 18.8gSaturated Fat: 2.5gCholesterol: 11mgSodium: 750mgFiber: 6gSugar: 13.3g

Made this recipe? Tap a star to rate it.

No ratings yet
Keyword caramelized onions, easy dinner, one-pot meal, slow cooker, vegetarian pasta