
French onion pasta salad takes cozy caramelized onions, tosses them with a creamy, zesty dressing, and turns regular pasta into something you’ll want every night. It feels classic and bright, great with lunch or at hangouts. It’s comfort food, but the kind you want to eat even in the summer.
Mixing caramelized onions with creamy tangy sauce gives every forkful a punch of flavor without feeling heavy. I first made a batch and honestly, it vanished before I even managed to grab my own plate.
Delicious Ingredients
- Chives: Go for the lively green ones for a fresh oniony kick at the end.
- Parsley: Use flat-leaf, wash it well, and chop it for a garden-fresh finish.
- White wine vinegar: Choose one with gentle tartness so it doesn’t overpower the mix.
- Mayonnaise: Use the full-fat stuff for a super smooth dressing.
- Farfalle pasta: Grab the brand you trust—this shape stands up to thick sauce perfectly.
- Soy sauce: Get the naturally brewed kind for the richest, savory base.
- Sour cream: Stick to the thicker full-fat kind so your salad stays creamy.
- Fresh garlic cloves: Plump ones work best—cooking them with the onions takes away the bite.
- Salt: Sea salt does the trick for even flavor throughout.
- White onions: Firm ones are best—their natural sugars help them turn super sweet while caramelizing.
- Extra virgin olive oil: Pick a cold-pressed bottle for flavor that really pops once the onions hit the pan.
Simple Steps to Make It
- Finish and Serve:
- Spoon your salad into a big bowl, top with those leftover onions and sprinkle on extra parsley or a crack of pepper. Enjoy cold or at room temp—whatever you like.
- Put It All Together:
- Drop your cooled pasta in with the dressing, add most onions, and keep a small handful aside for the prettiest topping. Mix gently so everything’s coated but your pasta doesn’t break.
- Mix Up the Dressing:
- Grab a big mixing bowl, add mayonnaise, sour cream, chopped chives, vinegar, soy sauce, and parsley. Give it a good whisk and taste. Need it looser? Pour in a little pasta water until it’s creamy and pourable.
- Let Your Pasta Cool:
- Lay your drained pasta out on a baking tray until just a bit warm. If you like, toss with a splash of oil so it won’t get clumpy.
- Boil Pasta:
- Boil salted water, toss in your farfalle, and stir well. Cook till perfectly al dente, then drain it off.
- Stir in Garlic:
- Sprinkle minced garlic over those sweet onions in the last minute—stir nonstop so it goes soft but not burnt and smells amazing.
- Slowly Caramelize Onions:
- Slice onions thin, cook low and slow in olive oil with a bit of salt, stirring every now and then for 40-45 minutes. Wait for them to turn soft and dark gold—don’t rush this part or you’ll lose all that flavor.

This is the kind of crowd-pleaser that’s always gone at parties. I’ll never forget bringing it to a family picnic—everyone from my youngest cousin to my grandma came back for more. Those onions fill the kitchen with such a warm smell; it always brings me right back to dinners growing up.
How to Store Leftovers
Keep extra salad in a sealed container in the fridge for up to three days. If your pasta seems a little dry, splash in some plant milk or a bit of extra vinegar to bring back the creaminess. Let it sit out about ten minutes before eating—makes a huge difference for texture.
Swap-Out Options
Short on farfalle? Penne or rotini work just as well. If you’re out of sour cream, plain Greek yogurt, vegan mayo, or non-dairy yogurt all do the job. Don’t have chives? Green onions will step in nicely.
Best Ways to Serve
Awesome for lunch by itself or alongside roasted veggies, tofu, grilled steak, or chicken. It brightens up anything from barbecue plates to regular Tuesday dinner, and always makes folks say wow at potlucks.

How French Onion Flavor Happened
That deep, sweet onion taste started with the classic French soup, comfort in a bowl for generations. This dish flips the idea on its head, turning those golden onions into something cool and laid-back for pasta. Every bite feels like you’re grabbing a little French café moment at home.
Recipe FAQs
- → What's the timing for caramelizing onions?
Plan on about 45 minutes on low, so the onions get super soft and turn golden and sweet.
- → Do I need to use farfalle?
Farfalle works awesome but you could use rotini or penne—they all soak up sauce well.
- → Can the sauce be made thinner?
You bet! Add some cool pasta water and stir till it's just how you like it.
- → Best way to serve this dish?
Serve it cold or at room temp, so it’s chill for parties or quick lunches.
- → Which fresh herbs make this pop?
Chopped chives and parsley do the trick—they make the sauce fresh and balance out the onions’ sweetness.
- → How long does it last in the fridge?
Good for two days tucked in the fridge and still tastes awesome for leftovers.