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Caramelized Onion Pasta with Chilli Oil

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This Caramelized Onion Pasta with Chili Oil is pure magic in a bowl! Sweet, slow-cooked onions meet a kick of homemade chili oil for a deliciously bold combo that hits all the right notes. It’s that perfect blend of savory and spicy—simple to whip up, but fancy enough to make any pasta night feel extra special.

  • Total Time: 40 minutes
  • Yield: 4 servings 1x

Ingredients

Scale

For the Pasta:

  • 12 oz (340g) pasta of your choice
  • Salt (for boiling water)

For the Caramelized Onions:

  • 2 large onions, thinly sliced
  • 2 tablespoons olive oil
  • 1 tablespoon butter
  • 1 teaspoon sugar (optional)
  • Salt and pepper, to taste

For the Chili Oil:

  • 1/4 cup olive oil
  • 1 tablespoon chili flakes
  • 1 garlic clove, minced
  • 1/2 teaspoon smoked paprika (optional)
  • 1/2 teaspoon salt

For Garnish (Optional but Highly Recommended):

  • Fresh parsley, chopped
  • Grated Parmesan cheese
  • Extra chili oil

Instructions

 

1. Caramelize the Onions:

  • Heat 2 tablespoons olive oil and 1 tablespoon butter in a large skillet over medium-low heat.
  • Add thinly sliced onions and a pinch of salt. Stir occasionally to avoid burning.
  • Sprinkle in sugar (if using) and continue to cook for 25–30 minutes until golden brown and jammy. Set aside.

2. Make the Chili Oil:

  • In a small saucepan, warm 1/4 cup olive oil over low to medium heat.
  • Add minced garlic and chili flakes, stirring gently for 1–2 minutes.
  • Stir in smoked paprika (if using) and salt. Remove from heat and let sit.

3. Cook the Pasta:

  • Boil a large pot of salted water.
  • Cook pasta according to package instructions until al dente (8–10 minutes).
  • Drain and reserve 1/2 cup of pasta water.

4. Bring It All Together:

  • In the skillet with onions, add the drained pasta.
  • Toss gently, adding a splash of reserved pasta water if needed.
  • Drizzle in chili oil and toss until the pasta is well coated.

5. Serve and Garnish:

  • Plate the pasta and top with parsley, Parmesan, and extra chili oil to taste.
  • Serve hot and enjoy!

Notes

  • Feel free to play around with the chili flakes and garlic—add more or less depending on how spicy you like things!
  • Want to boost the flavor and texture? Toss in some roasted veggies like bell peppers or zucchini.
  • You can caramelize the onions ahead of time and keep them in the fridge for 2–3 days—they’ll be ready to go when you are!
  • Prep Time: 10 minutes
  • Cook Time: 30 minutes

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