This pasta salad has real staying power โ ridged pasta coated in a buttermilk-blue cheese dressing, toasted walnuts, juicy grapes, crisp celery, and peppery arugula. It comes together in 35 minutes and holds up well enough to pack for lunch the next day. The blue cheese is the point, not a garnish, so if you like bold flavors this one is worth making.
The short version of why this works
Two things make this salad actually good instead of just okay. First, dressing the pasta while itโs still warm. Hot pasta absorbs the first coat of dressing rather than just wearing it, so the flavor goes all the way through each piece โ not just on the surface. Second, the dressing itself is built to cling. Buttermilk thins the mayo just enough to make it pourable, but the fat content stays high enough that it coats ridged pasta instead of pooling at the bottom of the bowl. A watery vinaigrette would slide right off fusilli; this one doesnโt. Those two details are what separate a pasta salad that tastes good cold the next day from one that tastes like dressed cardboard.
Common problems and fixes
- Salad tastes flat after chilling: Cold mutes salt and acid. Before serving, taste and add a small splash of red wine vinegar and a pinch of salt โ this wakes the whole bowl back up without making it taste over-dressed.
- Arugula wilts and turns slimy: Add the arugula right before serving, never when assembling ahead. It cannot survive even an hour in a dressed salad.
- Walnuts go soft: Store toasted walnuts separately if youโre making this more than a few hours ahead. Stir them in at serving time so they stay crunchy.
- Dressing breaks or looks grainy: This usually means the buttermilk was cold straight from the fridge while the mayo was room temperature. Shake the buttermilk well and let both sit out for 10 minutes before whisking โ they emulsify much more smoothly at similar temperatures.
- Pasta clumps while cooling: If you skip the steam-dry step and let pasta sit in a colander too long, it sticks together in chunks that are hard to separate once dressed. Two minutes spread on a sheet pan solves this completely โ dress it at the table if youโre serving it fresh, since clumped pasta that gets dressed cold never fully separates.
Substitutions that actually work
- Blue cheese: Gorgonzola Dolce or Danish blue are the mild, creamy options the recipe intends. Roquefort and Stilton are sharper and saltier โ use about half the amount if thatโs what you have, and taste the dressing before adding more salt.
- Buttermilk: Thin full-fat plain yogurt with a tablespoon of water or milk per third cup. It wonโt be identical but it works. Low-fat yogurt makes the dressing noticeably thinner.
- Walnuts: Pecans are a reasonable swap โ similar richness, slightly sweeter. Almonds work texturally but taste different enough that the salad shifts character.
- Grapes: Halved fresh figs in season are genuinely good here. Dried cranberries will work in a pinch but add concentrated sweetness โ use half the volume and expect a chewier texture.
- Baby arugula: Watercress gives a similar peppery bite. Spinach is milder and softer but wonโt fight the dressing the same way โ the slight bitterness of arugula is doing real work in balancing the rich cheese.
Blue Cheese & Walnut Pasta Salad
Equipment
- Large pot
- Colander
- Rimmed sheet pan
- Parchment paper
- Large mixing bowl
- Small mixing bowl
- Whisk
- Measuring cups and spoons
- Chef's Knife
- Cutting board
- Microplane or fine grater
- Tongs or salad spoon
Ingredients
For the Salad
- 1 tbsp kosher salt for the pasta water
- 1 cup walnut halves raw
- 12 oz short pasta fusilli, rotini, or farfalle
- 1 cup seedless red grapes halved
- 2 ribs celery thinly sliced on the bias
- 4 whole scallions thinly sliced, greens and whites
- 4 oz blue cheese crumbled; choose a creamy, tangy style
- 2 cups baby arugula lightly packed
For the Dressing
- โ cup mayonnaise full-fat for best texture
- โ cup buttermilk well-shaken
- 2 tbsp extra-virgin olive oil
- 1 tbsp Dijon mustard
- 1 tbsp red wine vinegar
- 1 tsp honey
- ยฝ tsp kosher salt
- ยฝ tsp freshly ground black pepper
- 1 clove garlic finely grated
- 1 tsp lemon zest finely grated
Instructions
- Heat the oven and toast the walnuts: Preheat the oven to 350ยฐF / 175ยฐC. Spread the walnut halves on a parchment-lined rimmed sheet pan and toast for 7โ9 minutes, until fragrant and lightly golden. Cool for 5 minutes, then coarsely chop.
- Boil the pasta: Bring a large pot of water to a rolling boil and add 1 tbsp kosher salt. Add the short pasta and cook for 10โ11 minutes until al dente (check package for timing). Drain in a colander and shake off excess water; spread on the empty sheet pan to steam-dry for 2 minutes.
- Whisk the dressing: While the pasta cooks, in a small bowl whisk together mayonnaise, buttermilk, olive oil, Dijon, red wine vinegar, honey, garlic, lemon zest, kosher salt, and black pepper for 30โ45 seconds until smooth and emulsified. The dressing should be pourable and glossy.
- Dress the warm pasta: Transfer the warm pasta to a large mixing bowl. Add half of the dressing and toss until every spiral is lightly coated. Let the dressed pasta stand for 5 minutes to absorb flavors.
- Fold in crunch and sweetness: Add the grapes, celery, and scallions. Toss gently to distribute without bruising the grapes.
- Add blue cheese and walnuts: Sprinkle in half of the chopped walnuts and half of the blue cheese; toss just until combined, keeping some crumbles intact for texture.
- Finish and balance: Pour in the remaining dressing to taste and fold in the arugula just until it wilts slightly from the warmth of the pasta. Taste and adjust acidity with a few extra drops of vinegar if desired.
- Garnish and serve: Top with the remaining walnuts and blue cheese. Serve immediately for warm-and-cool contrast, or refrigerate for 10โ20 minutes for a lightly chilled salad before serving.
Notes
Chefโs Tips
- Choose a creamy, moderately piquant blue cheese (like Gorgonzola Dolce or Danish blue) so it melts into the dressing without overpowering.
- Dressing clings best to ridged shapes (fusilli/rotini). Cook pasta to the firm side of al dente so it holds after dressing.
- Toast walnuts at 350ยฐF / 175ยฐC for even browning; if using a skillet, toast over medium heat, stirring constantly, for 3โ5 minutes.
- For make-ahead: keep arugula separate and fold in just before serving to preserve its peppery snap.
- Want it lighter? Swap half the mayonnaise for Greek yogurt and thin with a splash of buttermilk as needed.
- Add-ins that play nicely: diced pear, crisp bacon bits, or chopped tarragonโfold in at the end so aromas stay bright.
Nutrition
Frequently asked questions
Can I make this pasta salad the night before?
Yes, with a few conditions. Assemble everything except the arugula and walnuts, cover, and refrigerate overnight. Add both right before serving so the arugula stays crisp and the walnuts stay crunchy. Also hold back a few tablespoons of dressing to refresh the salad after chilling, since pasta absorbs dressing as it sits.
How much does one serving actually fill you up โ is this a side or a main?
A full serving is genuinely filling as a main, especially with the walnuts and cheese adding fat and protein. Six servings as written works well for a main-dish lunch; if youโre serving it alongside grilled meat or other substantial sides, it stretches to eight.
My blue cheese is very strong โ will it overpower everything?
It can, yes. Start with 3 oz instead of 4, crumble it finely so it distributes evenly, and taste the finished salad before adding more. A strongly aged blue mixed into the buttermilk dressing will mellow slightly, but itโs still worth going cautiously if your cheese is particularly pungent.
Can I use Greek yogurt instead of mayonnaise to make it lighter?
You can swap up to half the mayo for full-fat Greek yogurt without a big texture change. Replacing all of it gives a noticeably tangier, thinner dressing that doesnโt cling to the pasta as well โ the fat in the mayo is doing real structural work here.
What pasta shape actually works best if I canโt find fusilli or rotini?
Any short shape with ridges or crevices works โ cavatappi, gemelli, or radiatori are all good. Avoid smooth shapes like penne lisce or elbow macaroni; the dressing slides off instead of clinging. Farfalle is fine but the flat wings donโt grab dressing as effectively as a spiral.
How long does leftover pasta salad keep in the fridge?
Three days is the practical limit, stored in an airtight container. After that the pasta gets waterlogged and the walnuts lose all their texture. If you know youโre eating it over several days, store the walnuts and arugula separately and add them to each portion as you go.