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Caramelized Onion Pasta – vegetarian recipe
Stav Kogan

Caramelized Onion Pasta

A profoundly simple recipe where humble ingredients transform into a rich, sweet, and deeply satisfying meal. The secret lies in slowly cooking onions until they collapse into a jammy, flavorful sauce for pasta.
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Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Servings: 4 servings
Calories: 650
Ingredients Method Nutrition

Ingredients
  

  • Some recipes are so profoundly simple, they feel like magic. This Caramelized Onion Pasta is one of them. When I first tried it over two decades ago, I was stunned by how a few humble ingredients could transform into something so rich, sweet, and deeply satisfying. The secret lies in patience—slowly cooking onions until they collapse into a jammy, tender, and incredibly flavorful sauce. It’s a comforting, elegant meal that proves you don’t need a long list of ingredients to create something truly special.
  • 2 lbs (900 g / 31.7 oz) medium to large onions, about 5-6
  • 1/3 cup plus 2 tbsp / 110ml extra virgin olive oil, divided
  • Salt and freshly ground black pepper, to taste
  • 1 lb (450 g) long pasta, such as linguine, spaghetti, or fettuccine
  • Freshly grated Parmesan cheese, for serving
  • Pro-Tips for Perfect Pasta
  • Use a mandoline or food processor for uniformly thin onion slices, which ensures they cook evenly.
  • The starchy pasta water is liquid gold; it helps the onion sauce emulsify and cling beautifully to every strand of pasta.
  • For a savory, briny kick, add 2 tablespoons (30 ml / 1 fl oz) of capers or chopped black olives to the onions during the last 10 minutes of cooking.
  • A tiny splash of balsamic vinegar tossed in at the very end can cut through the richness and brighten the onions' sweetness.

Method
 

  1. Thinly slice the onions using a mandoline or a food processor's slicing disk for evenness.
  2. Place the sliced onions in a large, dry skillet over medium-low heat and cover.
  3. Stir every 5 minutes. The onions will first release a lot of water, then begin to dry out.
  4. After 20-30 minutes, when the onions begin to brown and stick to the pan, remove the cover.
  5. Add 1/3 cup (720 ml) of the olive oil, a generous pinch of salt, and a few grinds of pepper. Increase the heat to medium and continue to cook, stirring frequently, until the onions are uniformly deep brown, soft, and almost jam-like, about 10-20 minutes more.
  6. While the onions are finishing, bring a large pot of salted water to a boil.
  7. Cook the pasta according to package directions until al dente (tender but not mushy).
  8. Before draining, reserve about 1 cup (240 ml) of the starchy cooking water.
  9. Drain the pasta and transfer it to a large, warm serving bowl.
  10. Add the caramelized onions, the remaining 2 tablespoons (30 ml / 1 fl oz) of olive oil, and a generous amount of Parmesan cheese.
  11. Toss everything together, adding a splash of the reserved pasta water as needed to create a silky sauce that coats the pasta.
  12. Taste and adjust seasoning with more salt and pepper if needed.
  13. Serve immediately, passing extra Parmesan at the table.
  14. Don't rush the caramelization process. Low and slow heat is the key to developing the onions' deep, sweet flavor without burning them.

Nutrition

Calories: 650kcalCarbohydrates: 95gProtein: 20gFat: 22g

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