Caramelized Onion Pasta with Chilli Oil

Some of the most unforgettable dishes are born from humble ingredients. This Caramelized Onion Pasta with Chili Oil is a beautiful example of simplicity meeting indulgence.

Slowly caramelized onions melt into rich, sweet ribbons that wrap around al dente pasta, while a drizzle of homemade chili oil adds just the right kick to wake up your taste buds.

It’s a dish that feels fancy but comes together easily in your kitchen, perfect for cozy nights, spontaneous dinner guests, or when you’re craving something satisfying without the fuss. If you love deep flavors, a bit of spice, and silky pasta, this recipe is about to become your new favorite comfort food.

Why You’ll Love This Recipe

• Perfect balance of sweet, savory, and spicy
• Simple pantry ingredients turned into something special
• Customizable heat level
• Cozy, comforting, and quick enough for a weeknight

Caramelized Onion Pasta with Chili Oil Recipe

• Prep Time: 10 minutes
• Cook Time: 30 minutes
• Servings: 4
• Equipment Needed: Large skillet, saucepan, pasta pot, strainer

Ingredients

For the Pasta:

• 12 oz (340g) pasta of your choice – the comforting base that soaks up all the flavor
• Salt (for boiling water) – enhances the pasta’s natural flavor

For the Caramelized Onions:

• 2 large onions, thinly sliced – the heart of the dish, bringing sweetness and depth
• 2 tablespoons olive oil – helps soften and brown the onions
• 1 tablespoon butter – adds richness and helps achieve golden caramelization
• 1 teaspoon sugar (optional) – speeds up caramelization and boosts sweetness
• Salt and pepper, to taste – balances and enhances the onion flavor

For the Chili Oil:

• 1/4 cup olive oil – the base for infusing flavor
• 1 tablespoon chili flakes – brings the heat; adjust to your liking
• 1 garlic clove, minced – infuses the oil with savory aroma
• 1/2 teaspoon smoked paprika (optional) – adds a smoky dimension
• 1/2 teaspoon salt – balances and elevates the spice mix

For Garnish (Optional but Highly Recommended):

• Fresh parsley, chopped – adds freshness and color
• Grated Parmesan cheese – adds umami and creaminess
• Extra chili oil – for those who like it hot

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!

Variations to Try

• Add sauteed mushrooms for an earthy twist
• Stir in a splash of cream for a richer sauce
• Use gluten-free pasta for dietary needs
• Swap in red pepper flakes if you’re out of chili flakes

Storing Leftovers and Reheating

• Store leftovers in an airtight container for up to 3 days.
• Reheat in a skillet over low heat with a splash of water or oil to loosen.
• Avoid microwaving with cheese garnishes to preserve texture.

Serving Suggestions

• Pair with a crisp green salad and lemon vinaigrette
• Serve with crusty garlic bread to soak up the chili oil
• Add a poached or soft-boiled egg on top for extra richness

Pro Tips

• Stir onions occasionally, but let them sit undisturbed between stirs to encourage browning.
• Taste as you go – caramelization is personal; stop when it tastes right to you.
• Infuse the chili oil longer (off heat) for deeper flavor without burning garlic.
• A microplane is great for finely grating garlic and cheese!

This Caramelized Onion Pasta is proof that comfort food doesn’t need a long list of ingredients or complicated steps. It’s flavorful, flexible, and just the right amount of indulgent. Once you try it, you might find yourself craving it weekly. Trust me, it’s that good.

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