Cold Chicken Spinach Pasta Salad (Tangy Vinaigrette Dressing)

I started making this salad on a Tuesday when I had half a rotisserie chicken left in the fridge, some baby spinach that needed using up, and zero interest in turning on the oven. It came together in about 25 minutes, went into the fridge while I helped Zainab with homework, and by the time we sat down it had chilled into something genuinely good — tangy, a little garlicky, cold and satisfying in a way that hot pasta never quite is in the middle of summer.

What makes this work is the vinaigrette. I know that sounds obvious, but I've had pasta salads drowning in oily dressing and pasta salads that are basically dry noodles with some vegetables thrown in — this hits the middle. Red wine vinegar, Dijon mustard, olive oil, one minced garlic clove. That's it. The pasta absorbs some of it while it chills, so every bite has flavor instead of just the pieces that got lucky.

My husband and I eat this for lunch a few times a week when I've done a big batch of chicken. If you're already doing any kind of weekly meal prep, this fits right in — I have a full guide on how to meal prep for the whole week if you want a system for batching proteins like this. The salad keeps for three days in the fridge and actually tastes better on day two once everything has had time to settle.

One thing I'll say upfront: add the spinach as close to serving as you can manage. The first time I made this I mixed everything together the night before and the spinach was completely wilted and sad by lunch. Still tasted fine but looked terrible. So now I keep the spinach in a separate bag and toss it in right before eating. Five extra seconds, much better result.

Why You'll Love This Recipe

• It uses up leftover chicken without feeling like leftovers: Rotisserie chicken, baked chicken breast, whatever you have — it all works here. The vinaigrette soaks into the shredded pieces and makes them taste intentional rather than like an afterthought. I've made this with the last scraps of my baked ranch chicken and honestly it might be my favorite use for it.

• The dressing is simple and you probably already have everything: Olive oil, red wine vinegar or lemon juice, Dijon mustard, garlic, salt, pepper. Nothing obscure, nothing that requires a trip to a specialty store. I keep all of these stocked at Walmart and they last forever, so there's no special shopping involved.

• It genuinely holds up in the fridge: A lot of salads are sad by day two. This one isn't. The pasta stays firm, the vegetables stay crisp (minus the spinach, which is why I add it fresh each time), and the dressing redistributes as it sits. I make a double batch every Sunday and eat it through Wednesday without complaint.

• No oven, no stovetop after boiling the pasta: Once the pasta is cooked and cooled, everything else is just chopping and tossing. On days when the weather is hot and the last thing I want to do is stand over a stove, this is the answer. My kitchen stays cool and dinner still happens.

• It feeds a crowd without much effort: Scale it up and it works for a potluck or a barbecue side. I've brought this to gatherings a few times and people always ask what's in the dressing — it's the Dijon, by the way. It gives the vinaigrette a little body and keeps it from tasting flat.

Ingredients

• 8 oz rotini or bowtie pasta
• 2 cups cooked chicken breast, shredded or cubed (rotisserie chicken works great)
• 3 cups baby spinach leaves (add just before serving for best results)
• 1 cup cherry tomatoes, halved
• ½ cup cucumber, sliced
• ¼ cup red onion, thinly sliced
• ½ cup crumbled feta or shredded mozzarella (optional)
• ¼ cup olives, halved (optional)
• For the dressing:
• ¼ cup olive oil
• 2 tablespoons red wine vinegar or fresh lemon juice
• 1 teaspoon Dijon mustard
• 1 garlic clove, minced
• Salt and black pepper to taste

Directions

1. Cook and cool the pasta: Bring a large pot of well-salted water to a boil and cook the pasta according to package directions. Drain it, then rinse under cold running water until the pasta is completely cool to the touch. This stops the cooking and keeps the pasta from clumping or turning soft in the salad.
2. Make the dressing: In a small bowl or jar, whisk together the olive oil, red wine vinegar (or lemon juice), Dijon mustard, minced garlic, salt, and pepper until combined. The mustard helps emulsify everything so the dressing doesn't separate immediately. Set aside.
3. Build the salad base: In a large bowl, combine the cooled pasta, shredded chicken, cherry tomatoes, cucumber slices, and red onion. Toss gently to mix everything together evenly.
4. Dress and toss: Pour about two-thirds of the dressing over the salad and toss well. I hold back a little dressing because the pasta absorbs some of it while chilling — you'll add the rest right before serving to freshen everything up.
5. Chill the salad: Cover the bowl and refrigerate for at least 30 minutes, ideally an hour. This is when the pasta absorbs the vinaigrette and the flavors come together properly.
6. Add spinach and finish: Right before serving, add the baby spinach and toss. Pour over the remaining dressing and toss again. Add the feta, mozzarella, or olives if using, and taste for salt and pepper. Serve cold.

Tips for Success

• Cool the pasta completely before mixing: If the pasta is still warm when you add the dressing, it soaks up too much and the salad ends up dry after chilling. I rinse mine under cold water for a full minute and then spread it on a sheet pan for a few minutes to make sure there's no residual heat. It sounds like overkill but it actually makes a difference.

• Add spinach right before eating, not before chilling: I learned this the hard way — spinach left in the dressing overnight turns into a limp, dark mess. It still tastes okay but the texture is wrong and nobody wants to eat something that looks like that. Keep the spinach separate until you're ready to serve, then toss it in. Two minutes, big difference.

• Hold back some dressing: The pasta absorbs dressing while it sits in the fridge. If you pour everything in at once before chilling, the salad tastes underseasoned by the time you serve it. I split the dressing — most of it goes in before the chill, the rest goes in just before eating. This keeps it tasting bright instead of flat.

• Shred the chicken thin rather than cutting it in big chunks: Thin shreds tuck into the pasta and get coated in dressing, so every forkful has a bit of chicken rather than one big piece every few bites. I use two forks to pull the chicken apart while it's still slightly warm from cooking — it shreds much easier than when it's cold.

• Use a short, textured pasta shape: Rotini and bowtie both work well because the ridges and folds catch the dressing. I tried this once with penne and it was fine, but the rotini version genuinely tastes more flavorful because more dressing clings to each piece. If you're shopping at Aldi or Walmart, any rotini from the pasta aisle works perfectly.

Variations

• Grilled chicken instead of boiled or baked: Slice up some grilled chicken breast and use that instead of shredded. The slightly smoky, charred edges add a layer of flavor that works really well against the bright vinaigrette. My husband prefers this version — he thinks the plain shredded chicken is too mild, and honestly, he has a point.

• Creamy dressing swap: If you're not in a vinaigrette mood, swap the dressing for a good bottled ranch or Caesar. It makes the salad richer and a little heavier, but Zainab likes this version more than the original. It's a different dish but it works.

• Plant-based version: Skip the chicken and feta, and use a can of drained chickpeas or white beans instead. The chickpeas add enough protein and texture that you won't miss the chicken much. This is actually how I serve it when I want a lighter, meatless lunch — I season the chickpeas with a pinch of cumin before tossing them in.

• Add more vegetables: Bell peppers, sweet corn, shredded carrots, and halved olives all work here. I sometimes throw in whatever needs using up in the crisper drawer. Bell pepper and corn together make it feel more like a summer barbecue side. There's no wrong answer as long as the vegetables are crisp.

• Add fresh herbs: A handful of fresh basil or flat-leaf parsley stirred in right before serving makes the whole thing feel brighter. In Pakistan we'd probably reach for coriander (cilantro), and that works too if you like it. I've done both and they're different but both good.

Serving and Storage

Serving

Serve this cold, straight from the fridge. I like it in a wide bowl so you get a mix of pasta, chicken, and vegetables in each scoop rather than everything settling to the bottom. If you want to dress it up a little, a few lemon wedges on the side and some extra crumbled feta on top look nice without any extra work. For a summer lunch, I'll pair this with a cold drink — my tropical fruit punch is the current favorite in this house on hot days.

Storage

Store in an airtight container in the refrigerator for up to 3 days. If you've already added the spinach, it'll be wilted but still edible by day two — it just looks less fresh. I recommend storing spinach separately and adding a fresh handful each time you serve. Before eating leftovers, drizzle a tiny bit of olive oil and a small splash of vinegar over the top and toss — the pasta tends to absorb the dressing overnight and it needs a little reviving. Do not freeze this salad. The pasta and spinach both become watery and soft after thawing and it's not worth it.

Frequently Asked Questions

Can I make this salad the night before?

Yes, and it actually tastes better after chilling for a few hours. Just keep the spinach separate and toss it in right before you eat. Everything else — pasta, chicken, vegetables, dressing — can sit in the fridge overnight with no problem.

What chicken works best for this salad?

Rotisserie chicken is my first choice because it's already seasoned and the meat shreds easily. Cooked chicken breast works just as well — baked, poached, or even leftover grilled chicken. Whatever you have is fine. Just make sure it's fully cooled before adding it so it doesn't warm up the other ingredients.

Can I use a different pasta shape?

Any short pasta works — penne, fusilli, farfalle, even elbow macaroni in a pinch. I prefer rotini because the spirals catch the dressing really well, but the recipe isn't fussy about shape. Just avoid anything long like spaghetti or linguine, which doesn't mix well with the other ingredients.

Can I use bottled dressing instead of making my own?

Yes. A good bottled Italian vinaigrette or a light lemon vinaigrette both work well here. The homemade version only takes two minutes and tastes noticeably fresher, but on a busy day a quality bottled dressing is a completely reasonable shortcut. Start with about ⅓ cup and add more to taste.

How long does this salad keep in the fridge?

Up to 3 days in an airtight container. By day three the vegetables are softer but the flavor is still good. If the salad looks dry when you pull it out, a small drizzle of olive oil and a squeeze of lemon juice brings it back to life. Don't freeze it — the texture of the pasta and spinach doesn't survive thawing.

This is one of those recipes I keep coming back to because it works on a practical level, not just a "sounds good" level. It fits into a real week — it uses up chicken that's already cooked, it takes less than 30 minutes start to finish, and it sits in the fridge for days without falling apart. On the weeks I'm on top of meal prep, I'll batch cook a big tray of chicken on Sunday specifically for this. On the weeks I'm not, I grab a rotisserie bird from the store and shred it directly into the bowl.

If you want something warm to go alongside this on a cooler day, my garlic parmesan chicken pasta bake uses a lot of the same ingredients in a completely different direction — it's rich, cheesy, and oven-baked. Totally different energy from this cold salad, but they use the same pantry staples, which I appreciate.

The vinaigrette dressing is the part I'm proudest of in this recipe. It's the thing that keeps this from tasting like cold pasta with stuff mixed in. The Dijon gives it a little body and a slight sharpness, the garlic adds depth, and the red wine vinegar keeps it bright even after chilling. Make this at least once before you start swapping things out — you'll understand why the ratios work the way they do. 🥗✨

If you liked this, here are a few more recipes from my kitchen worth checking out:

• Garlic Parmesan Chicken Pasta Bake — the warm, cheesy, oven-baked counterpart to this cold salad
• Baked Ranch Chicken (Crispy, Juicy, and Ready in 45 Minutes) — great for making ahead and shredding into this salad
• Weekly Meal Prep Guide (How to Meal Prep for the Whole Week) — how to batch proteins and make salads like this one part of your routine
• Tropical Fruit Punch — what I serve alongside this on hot days
• Crock-Pot Butternut Squash Soup (Velvety, Set-and-Forget) — for when the season turns and you want something warm and hands-off