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Caramelized Onion and Garlic Spaghetti Recipe

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Caramelized Onion and Garlic Spaghetti features sweet, golden onions slowly cooked with garlic in butter, tossed with al dente spaghetti and fresh herbs for simple yet luxurious pasta.

Ingredients

Scale
  • 12 oz spaghetti
  • 3 large yellow onions, thinly sliced
  • 6 garlic cloves, thinly sliced
  • 4 tbsp unsalted butter
  • 3 tbsp olive oil
  • 1/2 cup grated Parmesan cheese
  • 1/4 cup fresh parsley, chopped
  • Salt and black pepper to taste
  • 1 tsp sugar (optional)
  • Red pepper flakes (optional)
  • Reserve 1 cup pasta water

Instructions

  • 1. Cook spaghetti in salted boiling water until al dente. Reserve 1 cup pasta water, drain.
  • 2. Meanwhile, heat butter and olive oil in large skillet over medium-low. Add sliced onions and 1/2 tsp salt. Cook 30-40 minutes, stirring occasionally, until deep golden brown.
  • 3. Add sliced garlic and sugar (if using). Cook 5 more minutes until garlic softens and onions caramelize fully.
  • 4. Add cooked spaghetti to skillet with 1/2 cup pasta water. Toss to coat, adding more water if needed for silky sauce.
  • 5. Remove from heat, stir in Parmesan and parsley. Season with black pepper and red pepper flakes. Serve immediately.

Notes

  • Low and slow caramelization essential for onion sweetness.
  • Don’t rush onions – 40 minutes minimum yields best flavor.
  • Pasta water creates creamy sauce without cream.
  • Top with extra Parmesan and serve with crisp green salad.

Nutrition

Keywords: caramelized onion pasta, garlic spaghetti, sweet onion spaghetti

Find it online: https://dishfoody.com/caramelized-onion-and-garlic-spaghetti-recipe/