Caramelized Onion Pasta with Chilli Oil

Sweet, spicy, and incredibly satisfying—this Caramelized Onion Pasta with Chilli Oil is a flavor-packed dish that transforms humble ingredients into something special. Golden caramelized onions bring natural sweetness, while a drizzle of homemade chilli oil adds a fiery finish. It’s a simple, elegant meal you can make any night of the week.

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Why You’ll Love This Recipe
Bold & Balanced – Sweet onions and spicy chilli oil make the perfect pair.
Pantry-Friendly – Made with ingredients you probably already have.
Elegant Yet Easy – Comes together quickly but tastes gourmet.
Customizable Heat – Adjust the chilli to suit your spice preference.
Vegetarian & Comforting – A meatless main with deep, rich flavor.

Ingredients You’ll Need

For the Caramelized Onions:

• 2 tbsp olive oil or unsalted butter
• 3 large yellow onions, thinly sliced
• 1 tsp sugar (optional, to speed up caramelization)
• ½ tsp salt
• 1 tbsp balsamic vinegar (optional for depth)

For the Pasta:

• 8 oz spaghetti or linguine
• Salt (for boiling water)
• ½ cup reserved pasta water

For the Chilli Oil:

• ¼ cup olive oil
• 1½ tsp red pepper flakes (adjust to taste)
• 1 garlic clove, minced
• ½ tsp smoked paprika (optional)

For Garnish:

• Fresh parsley or basil, chopped
• Grated parmesan or nutritional yeast (optional)
• Cracked black pepper

Tools You’ll Need

• Large skillet
• Medium saucepan
• Tongs or stirring spoon
• Knife and cutting board
• Small saucepan or heatproof bowl for chilli oil

Step-by-Step Instructions

Step 1: Caramelize the Onions

1. Heat 2 tbsp olive oil or butter in a large skillet over medium-low heat.
2. Add sliced onions and sprinkle with salt and sugar.
3. Cook slowly for 25–30 minutes, stirring every few minutes, until deep golden brown.
4. Stir in balsamic vinegar and cook 2–3 minutes more. Set aside.

Step 2: Cook the Pasta
5. Bring a pot of salted water to a boil and cook pasta until al dente.
6. Reserve ½ cup pasta water, then drain the pasta.

Step 3: Make the Chilli Oil
7. In a small saucepan, heat ¼ cup olive oil over low heat.
8. Add minced garlic, red pepper flakes, and smoked paprika.
9. Cook gently for 1–2 minutes until fragrant (don’t burn the garlic).
10. Remove from heat and set aside.

Step 4: Toss the Pasta with Onions
11. Add drained pasta to the pan with caramelized onions.
12. Add reserved pasta water a little at a time to loosen and coat.
13. Toss gently until pasta is coated with the onions.

Step 5: Finish with Chilli Oil & Serve
14. Drizzle chilli oil over the pasta and toss again to combine.
15. Garnish with chopped herbs, black pepper, and parmesan if desired.
16. Serve warm with extra chilli oil on the side.

Tips for the Best Caramelized Onion Pasta
Low & Slow – Patience is key when caramelizing onions.
Don’t Overcook Pasta – Al dente texture is best for this dish.
Layer the Heat – Start mild with chilli oil and add more to taste.
Add Protein – Toss in sautéed mushrooms, grilled chicken, or tofu for a heartier meal.
Keep It Creamy – Add a splash of cream or a spoonful of soft cheese for richness.

Serving Suggestions

• Side Salad: A light green or arugula salad balances the richness.
• Crusty Bread: Perfect for scooping up any leftover sauce.
• Roasted Veggies: Try adding roasted broccoli or zucchini on the side.
• Glass of Iced Tea or Lemon Water: To cool down the heat!

How to Store & Reheat

Storing:
Refrigerate leftovers in an airtight container for up to 3 days.

Reheating:

• Stovetop: Add a splash of water or oil and warm gently.
• Microwave: Reheat in 30-second intervals, stirring in between.

Frequently Asked Questions

1. Can I use pre-made chilli oil?
   Yes, but homemade gives you full control over flavor and spice level.
2. What pasta works best?
   Spaghetti, linguine, or tagliatelle work beautifully, but feel free to use what you have.
3. Is it very spicy?
   The heat is adjustable. Start light on the chilli flakes if you’re sensitive.
4. Can I make it vegan?
   Yes—use olive oil instead of butter and skip the cheese or use a plant-based version.
5. Can I add vegetables?
   Absolutely! Spinach, cherry tomatoes, or roasted peppers are great add-ins.

Final Thoughts
This Caramelized Onion Pasta with Chilli Oil is proof that simple ingredients can create bold, unforgettable flavor. With golden onions and a kick of spice, it’s a dish that feels indulgent yet comes together with ease. Try it once, and you’ll find yourself craving this comforting pasta again and again.

Let me know how spicy you like it and what extras you added—I’d love to hear how you make it your own!

Preparation Time: 10 minutes
Cooking Time: 30 minutes
Cuisine: Italian-Inspired

Nutritional Information (Per Serving – serves 4):
Calories: 410 | Protein: 9g | Carbohydrates: 50g | Fat: 18g | Fiber: 4g | Sodium: 260mg

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