Cold Spaghetti Pasta Salad with Homemade Italian Dressing

This cold spaghetti pasta salad is a delightful dish for potlucks and BBQs, perfect for a summertime meal with its Italian flair. The homemade dressing truly elevates the flavors, coating each noodle with a savory and bright taste that remains delicious even the next day.

Jump to: ℹ️ Overview | 🛒 Ingredients | 👩‍🍳 Recipe Tips | 📝Full Recipe Card | 📷 How To Make | 🥗 Serving Suggestions | 🍽 More Summer Salad Recipes

At A Glance

• ⏱ Ready In: About 1.5 hours (mostly chilling time)
• 🍽 Serves: 6–8
• 🌱 Diet: Vegetarian, Mediterranean-inspired
• 💪 Nutrition Highlights: Fresh vegetables, good fats from olive oil, calcium from cheese
• 🥕 Main Ingredients: Spaghetti, fresh vegetables, olives, Italian cheeses, homemade herb dressing
• 🔥 Flavor Profile: Bright, savory, slightly sweet, tangy, zesty, with a hint of heat
• 🧊 Meal-Prep Friendly: Keeps 3–4 days in the fridge; actually tastes better the next day
• Best Served With: Summer entertaining, potlucks, picnics, casual summer dinners

I first had cold spaghetti pasta salad at a friend’s backyard BBQ in the US, and I was immediately hooked. There’s something about slurping tender spaghetti coated in a tangy, garlicky dressing that just hits different than other pasta salads. But here’s the thing—most versions rely on bottled Italian dressing and seasoning packets, which gets the job done but can taste a little flat and overly processed. This homemade version achieves that same nostalgic, addictive flavor from scratch using pantry spices, good olive oil, and a few smart upgrades. You get the bright, savory, slightly sweet profile you’re craving, but with so much more depth and balance.

It’s especially perfect for those summer days when you want something cold, refreshing, and satisfying—something that actually tastes good the next day, which is honestly half the appeal for potlucks and entertaining. Once you make your own dressing, you’ll never look back.

👩‍🍳 You might also like these pasta salads:
⭐️ Cold Chicken Pasta Salad
🌿 Mediterranean Pasta Salad
💪 High-Protein Pasta Salad
🌽 Elote Pasta Salad
🥓 Chicken Bacon Ranch Pasta Salad
👉 More Pasta Salad Ideas

What You’ll Need

Here is what you’ll need for this spaghetti pasta salad recipe. Find the full measurements in the recipe card below.

For the Salad:

• Spaghetti (broken in half)—the star of the show; there’s something special about the way spaghetti strands take on dressing compared to other pasta shapes
• Cucumber (seeded and diced)—adds crisp, refreshing crunch
• Red bell pepper/capsicum (finely diced)—sweet, slightly tangy flavor and bright color
• Cherry tomatoes (halved)—juicy, bright, and fresh
• Red onion (finely minced)—adds bite and savory depth without overpowering
• Sliced olives—briny punch that pulls everything together; you can use black, Kalamata, or a mix
• Pepperoncini (finely minced)—delivers a gentle heat and vinegary tang; Golden Greek peppers can also be used
• Shredded Asiago cheese —milder, slightly creamy bite throughout the salad; Manchego or Comté cheese are also great options
• Finely grated Parmesan—melts into the dressing to help emulsify it while adding salty, savory depth. If you don’t have Asiago or other slightly softer aged cheeses, just add more Parmesan
• Fresh basil (thinly sliced)—bright, herbaceous finishing touch that keeps the salad feeling fresh

For the Dressing:

• Olive oil (good quality)—the base; good oil makes a real difference in flavor
• Red wine vinegar—provides acidity and tang
• Lemon juice—extra brightness and helps balance the sweetness
• Sugar—rounds out the flavors; don’t skip this
• Kosher salt—brings everything into focus
• Dried oregano, basil, and parsley—these dried herbs replace the seasoning packet and give you control over flavor depth
• Garlic powder and onion powder—savory umami without the harshness of fresh
• Celery seed—adds an unexpected herbal note that blooms as it sits, but can be left out
• Crushed red pepper flakes (optional)—gentle heat without taking over
• Dijon mustard—helps emulsify the dressing and adds subtle depth
• Finely grated Parmesan—helps the dressing emulsify and cling to the noodles
• Pepperoncini brine—the secret ingredient that ties everything together

Recipe Tips

• About that long ingredient list: At first glance, the dressing might look intimidating, but it’s mostly dried herbs and pantry staples you likely already have. They come together in just a couple of minutes. This homemade version replaces both the bottled dressing and the seasoning packet, giving you the same layered flavor (tangy, savory, well-balanced), but without the preservatives and fillers. It’s worth it.
• Why pepperoncini two ways? The brine adds acid and salt; the minced pepperoncini add gentle heat without overpowering everything. Together, they’re the secret to that addictive tang.
• Why both Asiago and Parmesan? The finely grated Parmesan melts into the dressing, helping to emulsify it while adding salty, savory depth. The Asiago is added in larger shreds, bringing a milder, slightly creamy bite throughout the salad. You can also use Manchego or Comte cheeses. You can use all Parmesan if you prefer, but the combination adds nice balance of flavor and texture.
• Flexible vegetables: This recipe is beautifully flexible. The base uses crisp, fresh vegetables for contrast, but you can swap or add based on what you have on hand or what’s in season. Think crunchy (celery, radishes, carrots), juicy (zucchini, green beans, corn), briny (artichoke hearts, sun-dried tomatoes, capers), or roasted (roasted red peppers, grilled zucchini, roasted cherry tomatoes).
• Make-ahead tip: You can prep everything the day before—chop vegetables, make the dressing, cook and chill the pasta. Just hold back the fresh basil until just before serving so it stays vibrant. Add a drizzle of olive oil or a splash of vinegar before serving if the salad looks a little dry.
• Storage: Store leftovers in an airtight container in the fridge for up to 3–4 days. The pasta will absorb the dressing as it sits, which is normal—just refresh it with a bit more olive oil or a splash of red wine vinegar or pepperoncini brine before serving. Keep it chilled (it shouldn’t sit out for more than about 2 hours). Don’t freeze—the vegetables lose their texture, and the dressing separates.