Caramelized Onion Cream Pasta (Printable)

Velvety pasta with deeply caramelized onions in a rich, creamy Parmesan sauce for ultimate comfort.

# What you need:

→ Pasta

01 - 14 oz fettuccine or spaghetti

→ Caramelized Onions

02 - 3 large yellow onions, thinly sliced
03 - 2 tbsp unsalted butter
04 - 1 tbsp olive oil
05 - 1 tsp sugar
06 - 1/2 tsp salt

→ Cream Sauce

07 - 3/4 cup plus 2 tbsp heavy cream
08 - 1/4 cup whole milk
09 - 1/2 cup grated Parmesan cheese
10 - 1 garlic clove, minced
11 - 1/4 tsp black pepper
12 - 1/4 tsp ground nutmeg (optional)
13 - Salt, to taste

→ Garnish

14 - 2 tbsp chopped fresh parsley
15 - Extra grated Parmesan cheese, for serving

# Directions:

01 - Bring a large pot of generously salted water to a rolling boil. Add the pasta and cook according to package directions until al dente. Before draining, reserve 1/2 cup of the starchy cooking water. Drain the pasta and set aside.
02 - While the pasta cooks, melt the butter with the olive oil in a large skillet over medium heat. Add the thinly sliced onions and sprinkle with the sugar and salt. Stir to coat evenly.
03 - Continue cooking the onions, stirring frequently, for 25 to 30 minutes until they turn a rich golden brown and become deeply caramelized. If the onions begin to stick to the pan, add a splash of water to deglaze and continue cooking.
04 - Stir in the minced garlic and cook for 1 minute until fragrant, being careful not to let it brown.
05 - Reduce the heat to low. Pour in the heavy cream and whole milk, stirring gently to combine. Add the grated Parmesan cheese, black pepper, and nutmeg if using. Let the sauce simmer for 2 to 3 minutes until it thickens slightly and coats the back of a spoon. Season with salt to taste.
06 - Add the drained pasta to the skillet with the sauce. Toss thoroughly, adding the reserved pasta water a little at a time until the sauce becomes silky and clings beautifully to every strand.
07 - Transfer to warm serving plates or bowls immediately. Finish with a generous sprinkling of chopped fresh parsley and additional grated Parmesan cheese.

# Expert Tips:

01 -
  • The onions transform into something that tastes like they took all day, even though you barely had to watch them.
  • It uses ingredients you probably already have, which means no emergency grocery runs.
  • The cream sauce clings to every strand of pasta in a way that feels restaurant fancy without any real technique.
02 -
  • Do not rush the onions on high heat, because they will char on the outside while staying raw inside and the whole dish will taste bitter.
  • Saving the pasta water is not optional, since that starch is what turns a greasy puddle into a velvety sauce that actually sticks.
03 -
  • Slice the onions as evenly as possible so they all caramelize at the same rate and you do not end up with burnt bits mixed with crunchy bits.
  • Taste the sauce before adding salt, because the Parmesan is already quite salty and it is easy to overdo it.

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