Caramelized Onion Cream Pasta (Printable)
Rich fettuccine with sweet caramelized onions swirled in a velvety Parmesan cream sauce. An indulgent vegetarian main.
# What You'll Need:
→ Pasta
01 - 14 oz fettuccine or spaghetti
→ Caramelized Onions
02 - 3 large yellow onions, thinly sliced
03 - 2 tablespoons unsalted butter
04 - 1 tablespoon olive oil
05 - 1 teaspoon sugar
06 - 1/2 teaspoon salt
→ Cream Sauce
07 - 3/4 cup plus 2 tablespoons heavy cream
08 - 1/4 cup whole milk
09 - 1/2 cup grated Parmesan cheese
10 - 1 garlic clove, minced
11 - 1/4 teaspoon black pepper
12 - 1/4 teaspoon ground nutmeg (optional)
13 - Salt, to taste
→ Garnish
14 - 2 tablespoons chopped fresh parsley
15 - Extra grated Parmesan cheese, for serving
# How-to Steps:
01 - Bring a large pot of salted water to a rolling boil. Add the fettuccine or spaghetti and cook according to package directions until al dente. Reserve 1/2 cup of the pasta cooking water before draining through a colander.
02 - While the pasta cooks, melt the butter with the olive oil in a large skillet set over medium heat. Add the thinly sliced onions and sprinkle evenly with the sugar and salt.
03 - Continue cooking the onions, stirring frequently, for 25 to 30 minutes until they turn a deep golden brown. If the onions begin to stick to the pan, add a splash of water to deglaze the fond and keep the cooking process moving.
04 - Stir the minced garlic into the caramelized onions and cook for about 1 minute until fragrant and softened.
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 additional salt to taste.
06 - Transfer the drained pasta directly into the skillet with the cream sauce. Toss thoroughly, adding small amounts of the reserved pasta water as needed to create a silky sauce that clings evenly to every strand.
07 - Serve immediately while hot. Finish each portion with a generous sprinkle of chopped fresh parsley and additional grated Parmesan cheese.
# Expert Pointers:
01 -
- The caramelized onions create a depth of flavor that tastes like you spent all day in the kitchen even though the hands on time is surprisingly manageable.
- It uses everyday pantry ingredients but transforms them into something that feels genuinely special and restaurant worthy.
02 -
- Do not rush the caramelization because turning up the heat to save time will give you charred onions instead of the sweet jammy ones that make this dish sing.
- Reserving the pasta water is not optional since that starchy liquid is the difference between a sauce that slides off the noodles and one that hugs every bite.
03 -
- Slice the onions as evenly as possible because uniform slices caramelize at the same rate and prevent the frustration of some pieces burning while others remain raw.
- Grate your Parmesan from a wedge right before adding it since pre grated cheese contains anti caking agents that prevent it from melting smoothly into the sauce.