Mustard Potato Salad for a Crowd

Here’s the thing about potato salad for a crowd. The dressing has to work overtime because you’re tossing three and a half pounds of potatoes, and a wimpy one just… disappears.

This version goes hard. Sharp dijon (Maille is my ride or die), Greek yogurt for body, red wine vinegar for that acidic punch, a touch of honey, and LOTS of fresh dill. Warm Yukon Golds get tossed in so they drink up every drop. Celery for crunch, shallot for a sneaky little bite, chives scattered throughout.

One hour in the fridge and you are golden. Bring this to the cookout and you WILL be asked for the recipe. Guaranteed.

mustard potato salad for a crowd
Image: jesslovescooking.com / All Rights reserved

Which Potatoes Work Best Here

Yukon Gold is the move. Medium-starch potatoes hold their shape after boiling while still soaking up that mustard vinaigrette like little sponges. Skip the Russets (they disintegrate into sad mush) and red potatoes stay too firm to absorb much flavor. Cut into 1-1.5 inch chunks, leave the skin ON, and salt your cooking water like you MEAN it.

Dress the Potatoes While Still Warm

  • Drain potatoes RIGHT AFTER they’re fork-tender and toss into the dressing immediately. They should be steaming hot, not “warm-ish.”
  • Skip the rinse. Potato starch clinging to the surface helps the vinaigrette grip every chunk.
  • Use a rubber spatula and fold, don’t stir. Stirring mashes Yukon Golds into sad paste.
  • The residual heat helps olive oil emulsify into the mustard, giving you a thicker, clingier coat once everything chills.
  • Wait 5 minutes after tossing before adding celery and shallots. Let the dressing soak INTO the potatoes first.
Hot potatoes = flavor in every bite. Cold potatoes = naked chunks drowning in a pool of dressing at the bottom of the bowl.

Make-Ahead Tips for a Crowd

Whisk the vinaigrette up to 3 days ahead… it actually improves as flavors meld. Boil potatoes and toss with dressing while WARM (this is non-negotiable for flavor absorption), then chill immediately. Hold the celery, shallots, chives, and dill until 15 minutes before serving.

Taste for salt before serving…. potatoes need adjustment after chilling. Loosen with a splash of olive oil and vinegar if dry. (Cold dulls everything, so don’t skip the final seasoning check.)

More From the Kitchen

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

  • Calories: 1700-1850
  • Protein: 28-34 g
  • Fat: 65-75 g
  • Carbohydrates: 250-270 g

Ingredients

For the base:

  • 3.5 lb potatoes (I prefer Yukon Gold for a creamier texture)
  • 2.5 tsp salt
  • 4 celery stalks (diced into 1/4-inch pieces for crunch)
  • 1 shallot
  • 1/3 cup chives

For the dressing:

  • 2.5 tbsp dijon mustard (I use Maille for a sharp kick)
  • 2 tbsp yogurt (I like Fage Greek yogurt for extra thickness)
  • 2.5 tbsp red wine vinegar
  • 1.5 tsp honey
  • 1/2 tsp pepper
  • 1/3 cup olive oil
  • 2 tbsp fresh dill, chopped

Step 1: Prep Veggies and Boil Potatoes

  • 3.5 lb potatoes
  • 2 tsp salt
  • 4 celery stalks, diced
  • 1 shallot, minced
  • 1/3 cup chives, chopped
  • 2 tbsp fresh dill, chopped

Dice the celery into 1/4-inch pieces and mince the shallot, then chop the chives and fresh dill—set all aside.

Cut potatoes into bite-sized chunks (about 1-1.5 inches), leaving the skin on for texture and nutrients.

Bring a large pot of salted water to a boil (using about 2 teaspoons of salt in the water), then add potatoes and cook for 10-15 minutes until just fork-tender but still holding their shape—you want them to absorb the dressing while warm, but not fall apart.

Step 2: Whisk the Tangy Dressing

  • 2.5 tbsp dijon mustard
  • 2 tbsp yogurt
  • 2.5 tbsp red wine vinegar
  • 1.5 tsp honey
  • 0.5 tsp salt
  • 0.5 tsp pepper
  • 1/3 cup olive oil

While potatoes cook, whisk together the Dijon mustard, Greek yogurt, red wine vinegar, honey, and remaining salt and pepper in a large bowl until smooth and well combined.

The yogurt adds creaminess while the mustard and vinegar provide bright, sharp flavor—this is your flavor foundation.

Slowly drizzle in the olive oil while whisking to emulsify the dressing, creating a cohesive sauce that will cling beautifully to the warm potatoes.

Step 3: Coat the Hot Potatoes

  • cooked potatoes from Step 1
  • mustard vinaigrette from Step 2

Drain the cooked potatoes well and immediately transfer them to the bowl with the mustard vinaigrette while they’re still warm—this is key, as warm potatoes absorb the dressing much better than cooled ones, resulting in more flavorful salad throughout.

Gently fold the potatoes into the dressing using a rubber spatula, being careful not to break them apart, until every piece is well coated.

Step 4: Fold in Herbs and Aromatics

  • diced celery from Step 1
  • minced shallot from Step 1
  • chopped chives from Step 1
  • chopped dill from Step 1

Fold in the diced celery, minced shallot, and chopped chives, distributing them evenly throughout the salad.

The celery adds a fresh crunch that contrasts beautifully with the creamy dressing, and the shallot gives it a subtle onion flavor without overpowering.

I like to add the dill at this point too so it stays vibrant and fragrant rather than getting buried and muted during chilling.

Step 5: Refrigerate Until Cold

Transfer the salad to a serving bowl and refrigerate for at least 1 hour before serving—this allows the flavors to meld and the texture to set.

The cold temperature mellows the mustard’s sharpness slightly while allowing the vinegar and dill to sing.

Taste and adjust seasoning with additional salt, pepper, or vinegar if needed before serving to a crowd.

mustard potato salad for a crowd
Image: jesslovescooking.com / All Rights reserved

Classic Mustard Potato Salad for a Crowd

Delicious Classic Mustard Potato Salad for a Crowd recipe with step-by-step instructions.
Prep Time 30 minutes
Cook Time 1 hour 5 minutes
Total Time 1 hour 35 minutes
Servings: 10 servings
Calories: 1775

Ingredients
  

For the base::
  • 3.5 lb potatoes (I prefer Yukon Gold for a creamier texture)
  • 2.5 tsp salt
  • 4 celery stalks (diced into 1/4-inch pieces for crunch)
  • 1 shallot
  • 1/3 cup chives
For the dressing::
  • 2.5 tbsp dijon mustard (I use Maille for a sharp kick)
  • 2 tbsp yogurt (I like Fage Greek yogurt for extra thickness)
  • 2.5 tbsp red wine vinegar
  • 1.5 tsp honey
  • 1/2 tsp pepper
  • 1/3 cup olive oil
  • 2 tbsp fresh dill, chopped

Method
 

  1. Dice the celery into 1/4-inch pieces and mince the shallot, then chop the chives and fresh dill—set all aside. Cut potatoes into bite-sized chunks (about 1-1.5 inches), leaving the skin on for texture and nutrients. Bring a large pot of salted water to a boil (using about 2 teaspoons of salt in the water), then add potatoes and cook for 10-15 minutes until just fork-tender but still holding their shape—you want them to absorb the dressing while warm, but not fall apart.
  2. While potatoes cook, whisk together the Dijon mustard, Greek yogurt, red wine vinegar, honey, and remaining salt and pepper in a large bowl until smooth and well combined. The yogurt adds creaminess while the mustard and vinegar provide bright, sharp flavor—this is your flavor foundation. Slowly drizzle in the olive oil while whisking to emulsify the dressing, creating a cohesive sauce that will cling beautifully to the warm potatoes.
  3. Drain the cooked potatoes well and immediately transfer them to the bowl with the mustard vinaigrette while they’re still warm—this is key, as warm potatoes absorb the dressing much better than cooled ones, resulting in more flavorful salad throughout. Gently fold the potatoes into the dressing using a rubber spatula, being careful not to break them apart, until every piece is well coated.
  4. Fold in the diced celery, minced shallot, and chopped chives, distributing them evenly throughout the salad. The celery adds a fresh crunch that contrasts beautifully with the creamy dressing, and the shallot gives it a subtle onion flavor without overpowering. I like to add the dill at this point too so it stays vibrant and fragrant rather than getting buried and muted during chilling.
  5. Transfer the salad to a serving bowl and refrigerate for at least 1 hour before serving—this allows the flavors to meld and the texture to set. The cold temperature mellows the mustard’s sharpness slightly while allowing the vinegar and dill to sing. Taste and adjust seasoning with additional salt, pepper, or vinegar if needed before serving to a crowd.

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