
This creamy caramelized onion pasta is pure comfort in a bowl and the sweet jammy onions turn a simple weeknight dinner into something truly special The recipe brings together buttery ribbons of pasta coated in a silky sauce scented with a hint of chili This is the kind of dish that makes my house smell amazing and warms up even the longest day
The first time I whipped this up it was just because I had too many onions but now it is our go to fast dinner and even the most skeptical family member asks for seconds
Ingredients
- Olive oil: brings out sweetness in onions pick extra virgin for extra flavor
- Butter: adds silkiness and richness go for high quality unsalted butter for control
- Onions: develop savory sweetness choose yellow or sweet varieties and slice thinly for best caramelization
- Chilli oil: brings a hint of warmth use your favorite brand or homemade for kick
- Heavy cream: creates the luscious sauce full fat only for a true creamy result
- Fresh parsley: brightens up the dish flat leaf is more flavorful than curly
- Garlic powder: gives depth without overpowering fresh flavor
- Salt and pepper: elevate all the flavors always taste and season as you go
Step-by-Step Instructions
- Prep the Onions:
- Slice onions as thinly as possible on a sturdy cutting board with a sharp knife Thinner slices mean deeper caramelization in less time
- Caramelize the Onions:
- Combine olive oil and butter in a skillet over low to medium heat Melt gently then add the sliced onions Cook for at least twenty minutes stirring every few minutes until onions are deep golden brown and very soft This is what turns them sweet and jammy so take your time and avoid turning up the heat
- Build the Sauce:
- Mix in the chilli oil and stir well Next pour in heavy cream Add garlic powder plus a good pinch of salt and pepper Let everything simmer for five minutes so sauce thickens and flavors blend together taste and adjust seasoning
- Cook and Drain Pasta:
- While the sauce simmers bring a large pot of salted water to a boil Cook pasta according to package directions until al dente and drain using a strainer Reserve about half a cup of pasta cooking water
- Finish and Combine:
- Add drained pasta to the skillet and toss in the warm sauce Use some of the reserved pasta water for extra creaminess Stir over medium high heat briefly so the pasta soaks up all the flavor
- Garnish and Serve:
- Sprinkle with lots of fresh parsley and a teaspoon of salt Let the pasta cool just enough to eat then dig in and enjoy

Caramelizing onions was my first culinary magic trick and even now I love watching the transformation A big table of family digging into steaming bowls of this pasta always brings a big smile to my face
Storage Tips
Let leftovers come to room temperature before storing Use a tightly sealed container in the fridge and eat within three days On reheating add a splash of milk or cream to refresh the sauce Avoid microwaving for too long or the cream might separate
Ingredient Substitutions
If heavy cream is not on hand try half and half for a lighter version Use leek as an alternative to onion for a milder sweeter flavor No fresh parsley Try basil or chives A vegan butter and coconut cream swap will make this dairy free
Serving Suggestions
This pasta pairs perfectly with a crisp green salad or grilled vegetables For protein add cooked shredded chicken or crispy pancetta on top I often serve this as a side for a cozy roast dinner

Cultural Context
Pasta with onions appears in many cultures but the French tradition of slow caramelized onions lifts this recipe into special territory The slow cooking step is key and reminds me of classic French onion soup Inspiration comes from both Italian cream sauces and that classic bistro flavor
Common Recipe Questions
- → How long does it take to caramelize onions for this pasta?
Caramelizing onions typically takes around 20 minutes on low to medium heat. Stir occasionally until they reach a deep golden brown hue.
- → Can I use a different kind of oil instead of chilli oil?
Yes, you can substitute chilli oil with olive oil for a milder flavor, or use infused oils for added depth.
- → What type of pasta works best with this sauce?
The sauce coats strands and shapes alike, so spaghetti, fettuccine, penne, or rigatoni all pair beautifully with these creamy, onion-forward flavors.
- → Can I add cheese to the dish?
Absolutely! A sprinkle of grated Parmesan or pecorino makes an excellent topping and blends well with the creamy sauce and caramelized onions.
- → Is fresh parsley essential, or can I use dried?
Fresh parsley provides vibrant flavor and color, but dried parsley can be used in a smaller quantity if needed.