Caramelized Onion And Herb Buttered Noodles

Let me tell you this is one of those recipes that feels super fancy but is secretly so easy. These caramelized onion and herb buttered noodles are rich, savory, buttery, and packed with herby goodness. The real magic? Those golden, jammy onions. And you can totally make it your own by picking whatever fresh herbs you love or have on hand. It’s comfort food with just a little flair, and it all comes together with pantry basics. Let’s get into it!

Method

1. Caramelize the Onions

Start by heating 2 tablespoons of olive oil in a large sauté pan over medium-low heat. Once the oil is warm, add your thinly sliced yellow onions. Spread them out evenly in the pan and let them cook slowly. This part takes some patience about 30 minutes but it’s worth it. Stir the onions every few minutes to keep them from burning and to make sure they cook evenly. Over time, they’ll shrink down, turn golden brown, and become soft and jammy. The key here is low and slow heat don’t try to speed this up by turning up the heat, or you’ll end up with crispy onions instead of sweet, caramelized ones.

2. Add Flavor to the Onions

Once the onions are fully caramelized, it’s time to layer in even more flavor. Stir in 1 tablespoon of fresh thyme, 1 tablespoon of balsamic vinegar, and a good pinch of salt and pepper. Use your spoon or spatula to scrape up the brown bits that may have formed on the bottom of the pan those are packed with flavor. Let everything cook together for another 2–3 minutes so the vinegar can reduce slightly and the herbs can release their aroma. Then, remove the pan from the heat and set the mixture aside to cool slightly.

3. Boil the Pasta

While your onions are cooling, bring a large pot of salted water to a boil. Add your pasta (about ½ pound, any shape you like) and cook it according to the package instructions until it’s al dente. Before draining the pasta, scoop out about ½ cup of the starchy pasta water and set it aside. This pasta water is key for helping the sauce come together later. Once the pasta is drained, keep it warm while you make the butter sauce.

4. Blend the Butter and Herbs

Now it’s time to turn all that delicious flavor into a buttery sauce. In a food processor or blender, combine the softened stick of butter with your cooled caramelized onions and whatever fresh herbs you’re using. I used a handful of basil, tarragon, chives, and parsley, but you can use whatever herbs you love or have on hand. Pulse everything together until the butter mixture is smooth and the herbs are chopped up evenly. You should end up with a soft, flavorful compound butter that smells amazing.

5. Toss Everything Together

Immediately toss the hot, cooked pasta with the herb and onion butter mixture in a large bowl or pot. Add a little bit of the reserved pasta water a few tablespoons at a time until the butter melts into a silky sauce that coats every noodle. The pasta should look glossy and well-seasoned. Give it a taste and adjust the salt and pepper if needed.

6. Add Finishing Touches

To finish, you can sprinkle the noodles with grated Parmesan cheese if you’d like. It’s optional, but it adds a lovely salty, nutty flavor that complements the sweetness of the onions and the freshness of the herbs. Serve warm, and enjoy every buttery, herby bite!

Necessary Tools

  • Large sauté pan
  • Large pot (for pasta)
  • Wooden spoon or spatula
  • Food processor or blender
  • Strainer
  • Knife and cutting board
  • Measuring spoons

Caramelized Onion And Herb Buttered Noodles

Recipe by Justin SelkCuisine: AmericanDifficulty: Easy
Servings

3

servings
Prep time

10

minutes
Cooking time

30

minutes
Total time

40

minutes

Ingredients

  • ½ lb pasta (any shape you like!)

  • 2 tbsp olive oil

  • 2 yellow onions, thinly sliced

  • 1 tbsp fresh thyme

  • 1 tbsp balsamic vinegar

  • 1 stick (½ cup) butter, softened

  • Salt and pepper to taste

  • As many fresh herbs as you want! (I used basil, tarragon, chives, and parsley)

  • Optional Parmesan cheese for topping

Directions

  • Caramelize the onions – In a big pan, heat the olive oil over medium-low. Add the onions and cook slowly for about 30 minutes. Stir every so often until they turn golden and jammy.
  • Add flavor – Stir in the thyme, balsamic vinegar, salt, and pepper. Scrape up any yummy brown bits from the bottom of the pan. Let it cook for a few more minutes, then set it aside to cool.
  • Boil the pasta – Cook your pasta according to the package directions. Make sure to save a little of the pasta water before draining!
  • Blend the butter mix – In a food processor, add the butter, caramelized onions, and all your fresh herbs. Pulse until it’s nice and smooth.
  • Toss it all together – Mix the hot pasta with the herby onion butter. Add a splash of pasta water to help the sauce coat every noodle. Taste and adjust seasoning if needed.
  • Top it off – Optional, but highly encouraged  sprinkle on some parmesan and dig in!

Notes

  • Don’t rush the onions low and slow is the name of the game. Turning up the heat will burn them instead of caramelizing them.
  • Let the onion mixture cool slightly before blending with the butter so it doesn’t melt everything too fast.
  • Save that pasta water! It helps make the sauce silky and smooth.

Serving Suggestions

  • Serve this as a cozy weeknight dinner with a simple green salad on the side.
  • Want to make it a full meal? Add grilled chicken or sautéed mushrooms on top.
  • Perfect for lunch leftovers just reheat gently with a splash of water.

Fun Fact

Caramelizing onions takes time because you’re slowly pulling out the natural sugars. That’s why they taste so sweet and rich no added sugar needed!

Conclusion

These caramelized onion and herb buttered noodles are a dreamy mix of savory, sweet, and herby goodness. It’s the kind of dish that feels like a warm hug but also gives you space to play around with flavors. Easy to make, easy to love. Now go make your kitchen smell amazing.

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