Rich & Savory Pasta with Caramelized Onions

This savory sweet Pasta with Caramelized Onions is made with yellow onions, parmesan cheese, and rigatoni, and ready in 55 minutes. Tossing the al dente noodles directly into the deep, jammy onions creates a rich, glossy sauce right in the pan. I find the slow cooking process incredibly rewarding.

What I Learned Making This

I used to rush the cooking process, turning up the heat to soften the onions faster. That usually resulted in burnt edges rather than the deep, even brown color needed for flavor.

The secret is keeping the heat at medium-low and letting the natural sugars slowly release. Adding a splash of water when the pan gets dry prevents sticking and builds a jam-like consistency.

Pasta with Caramelized Onions Ingredients

• 1 lb rigatoni or penne pasta
• 3 large yellow onions, thinly sliced
• 3 tbsp unsalted butter
• 2 tbsp olive oil
• 2 cloves garlic, minced
• 1/2 cup dry white wine
• 1 cup freshly grated parmesan cheese
• 1 tbsp fresh thyme leaves
• 1 tsp kosher salt
• 1/2 tsp black pepper

How To Make Pasta with Caramelized Onions

1. Caramelize the onions: In a large skillet over medium-low heat, melt the butter and olive oil. Add the sliced onions and salt, cooking slowly for 40 to 45 minutes until deep golden brown.
2. Cook the garlic and thyme: Stir in the minced garlic and fresh thyme. Cook for 1 to 2 minutes until fragrant.
3. Boil the pasta: While the onions finish cooking, boil the rigatoni in heavily salted water until just al dente. Reserve 1 cup of pasta water before draining.
4. Deglaze the pan: Pour the white wine into the skillet with the onions, scraping up any browned bits from the bottom. Let it simmer until mostly evaporated.
5. Build the sauce: Add the drained pasta and half a cup of reserved pasta water to the skillet. Toss continuously while slowly sprinkling in the parmesan cheese until a glossy sauce forms.

Recipe Tips

• Slice onions evenly: Consistent slices ensure they cook at the same rate without some burning while others remain raw.
• Be patient: Real caramelization takes at least 40 minutes, so resist the urge to crank up the heat.
• Save the pasta water: The starch is crucial for binding the fat and cheese into a smooth, cohesive sauce.

What To Serve With Pasta with Caramelized Onions

This rich dish pairs perfectly with a crisp, acidic side salad to cut through the sweetness of the onions. I also recommend serving it with garlic bread to soak up any leftover glossy sauce from the bottom of the bowl.

How To Store

Keep leftovers in an airtight container in the fridge for up to 3 days. Reheat gently on the stove with a splash of water or broth to loosen the sauce.

FAQs

Can I use red onions instead?
Yes, red onions work well and will give the dish a slightly sharper flavor and a distinct purplish-brown color.

Can I make this dairy-free?
You can substitute the butter with extra olive oil and use a plant-based parmesan alternative.

Do I have to use wine?
No, you can easily substitute the wine with vegetable broth, chicken broth, or simply water to deglaze the pan.

Nutrition

• Calories: 450
• Total Fat: 16g
• Saturated Fat: 8g
• Cholesterol: 35mg
• Sodium: 550mg
• Total Carbohydrate: 62g
• Protein: 14g

Pasta with Caramelized Onions

Recipe by Paula

Servings

4

servings

Prep time

10

minutes

Cooking time

45

minutes

Total time

55

minutes

Savory, sweet Pasta with Caramelized Onions features slow-cooked yellow onions, fresh thyme, and grated parmesan cheese. Ready in 55 minutes, this comforting dinner turns simple pantry staples into a rich, glossy meal you will want to serve every weekend.

Ingredients

• 1 lb rigatoni or penne pasta

• 3 large yellow onions, thinly sliced

• 3 tbsp unsalted butter

• 2 tbsp olive oil

• 2 cloves garlic, minced

• 1/2 cup dry white wine

• 1 cup freshly grated parmesan cheese

• 1 tbsp fresh thyme leaves

• 1 tsp kosher salt

• 1/2 tsp black pepper

Directions

• 1. Caramelize the onions: In a large skillet over medium-low heat, melt the butter and olive oil. Add the sliced onions and salt, cooking slowly for 40 to 45 minutes until deep golden brown.
• 2. Cook the garlic and thyme: Stir in the minced garlic and fresh thyme. Cook for 1 to 2 minutes until fragrant.
• 3. Boil the pasta: While the onions finish cooking, boil the rigatoni in heavily salted water until just al dente. Reserve 1 cup of pasta water before draining.
• 4. Deglaze the pan: Pour the white wine into the skillet with the onions, scraping up any browned bits from the bottom. Let it simmer until mostly evaporated.
• 5. Build the sauce: Add the drained pasta and half a cup of reserved pasta water to the skillet. Toss continuously while slowly sprinkling in the parmesan cheese until a glossy sauce forms.