Ina Garten Potato Salad: Why the Buttermilk Trick Works
If you’ve ever wondered why Ina Garten potato salad shows up at every backyard barbecue from Memorial Day through Labor Day, the answer isn’t a secret ingredient. It’s a technique. Ina parboils her potatoes, then lets them finish cooking in their own steam, and dresses them with a buttermilk-mustard mixture instead of straight mayonnaise. The result is a salad that holds its shape, soaks up flavor, and never turns into mush by the time it hits the picnic table.
This isn’t a fussy recipe. It’s the kind of dish you can make on a Tuesday for dinner leftovers or scale up for a crowd of twenty, and it comes together with ingredients most home cooks already have on hand.
What Makes Ina Garten Potato Salad Different
Most potato salad recipes lean entirely on mayonnaise, which can taste heavy and one-note once it’s been sitting in the fridge for a few hours. Ina’s version splits the dressing between mayonnaise and buttermilk, then adds both Dijon and whole-grain mustard for texture and bite. Fresh dill ties the whole thing together.
The technique matters just as much as the ingredients. Rather than boiling potatoes until fully tender (which is how you end up with a mushy, waterlogged salad), Ina simmers them only until a knife slides in with slight resistance. Then she drains them and lets them sit, covered, over the residual heat of the empty pot for 15 to 20 minutes. The potatoes finish cooking gently in their own steam, which keeps them firm enough to hold their shape when tossed with dressing.
Quick answer: Ina Garten’s potato salad recipe uses small white potatoes cooked by parboiling and steaming, dressed while still warm in a mixture of mayonnaise, buttermilk, Dijon and whole-grain mustard, fresh dill, celery, and red onion, then chilled for a few hours before serving.
The Ina Garten Potato Salad Recipe
This recipe, sometimes listed on Food Network as “Best Potato Salad,” comes from Ina’s Barefoot Contessa collection and yields 6 to 8 servings in about 30 minutes of total time.
Ingredients:
- 3 pounds small white potatoes
- Kosher salt
- 1 cup mayonnaise
- 1/4 cup buttermilk
- 2 tablespoons Dijon mustard
- 2 tablespoons whole-grain mustard
- 1/2 cup chopped fresh dill
- Freshly ground black pepper
- 1/2 cup chopped celery
- 1/2 cup chopped red onion
Directions:
- Place the potatoes and 2 tablespoons of salt in a large pot of water. Bring to a boil, then lower the heat and simmer for 10 to 15 minutes, until the potatoes are barely tender when pierced with a knife.
- Drain the potatoes in a colander, then place the colander back over the empty pot and cover with a clean kitchen towel. Let the potatoes steam for 15 to 20 minutes.
- While the potatoes steam, whisk together the mayonnaise, buttermilk, Dijon mustard, whole-grain mustard, dill, 1 teaspoon salt, and 1 teaspoon pepper in a small bowl. Set aside.
- Once the potatoes are cool enough to handle, cut them in half or quarters, depending on size. Place them in a large bowl while still warm and pour enough dressing over them to moisten.
- Add the celery, red onion, 2 teaspoons salt, and 1 teaspoon pepper. Toss well, cover, and refrigerate for a few hours to let the flavors blend. Serve cold or at room temperature.
I’ve made this potato salad for more than one summer cookout, and the step people skip is dressing the potatoes while they’re still warm. Warm potatoes absorb the buttermilk mixture instead of just sitting under it, which is the difference between a salad that tastes seasoned all the way through and one that’s bland in the middle.
Why the Parboil-and-Steam Method Matters
The technique behind this potato salad is really the whole story. Boiling potatoes until fully cooked is the fastest route to a mushy, falling-apart salad, especially once you add the weight of a creamy dressing and start tossing. By pulling the potatoes out of the water slightly underdone and letting them finish in steam, you get potatoes that are tender all the way through but still hold a clean edge when cut.
This method works especially well with waxy, low-starch potatoes like small white potatoes, new potatoes, or Yukon Golds, since they naturally hold their shape better than starchy russets.
Ingredient Substitutions That Work
Ina Garten’s potato salad is forgiving, and plenty of home cooks have adapted it over the years without losing what makes it good.
Potato type: Small white potatoes are the original call, but red potatoes, new potatoes, fingerling potatoes, or Yukon Golds all work well because they’re waxy and hold their shape after cooking.
Buttermilk: If you don’t keep buttermilk on hand, a mix of equal parts plain full-fat yogurt and milk gets you close to the same tang. Sour cream or Greek yogurt can also stand in for some or all of the buttermilk for a slightly thicker dressing.
Mayonnaise: For a lighter version, cut back on mayonnaise and increase the buttermilk ratio, or swap in Greek yogurt for part of the mayo. Some cooks use a 1:1 mayonnaise-to-buttermilk ratio instead of Ina’s original 4:1 for a tangier, less heavy dressing.
Dill: Fresh dill gives the brightest flavor, but dried dill weed works in a pinch. Start with about a third of the amount, since dried herbs are more concentrated.
Celery or mustard: Both are easy to scale up or down, or skip entirely, based on personal taste. Some versions omit the whole-grain mustard and use extra Dijon instead.
How Long Does Ina Garten Potato Salad Last
Stored in an airtight container in the refrigerator, this potato salad stays good for about 3 to 5 days. If the dressing thickens or the salad looks a little dry after chilling, a splash of buttermilk or an extra spoonful of mayonnaise loosens it right back up before serving.
You can also make the full salad up to a day ahead of a party. The flavor actually improves after a longer rest in the fridge, since the potatoes have more time to absorb the dressing. Just taste and re-season with salt and pepper before you serve it, since chilling can mute seasoning slightly.
Can You Make This Potato Salad Without Mayonnaise
Yes. If you’d rather skip mayonnaise altogether, a vinaigrette-based approach works with the same parboil-and-steam potatoes. Ina’s own French Potato Salad uses a Dijon vinaigrette with fresh herbs and scallions instead of a mayo-buttermilk base, and it holds up just as well for a picnic or backyard dinner, especially served warm or at room temperature rather than fully chilled.
What to Serve With Potato Salad
This potato salad is built for warm-weather entertaining, and it pairs naturally with grilled proteins. Try it alongside grilled chicken, burgers, steak, or barbecued ribs. It also holds its own next to lighter mains like grilled fish or a big green salad if you want to round out a lunch spread. For a full backyard barbecue menu, add corn on the cob, baked beans, or a simple pasta salad alongside it.
Where This Recipe Comes From
Ina Garten’s potato salad first appeared in her Barefoot Contessa cookbook collection and has circulated on Food Network for years, where it’s also listed as “Best Potato Salad.” It’s easy to see why it’s stuck around. Reviewers consistently point to the same two things: the tangy dressing built on dill and two kinds of mustard, and the texture of the potatoes, which stays tender without ever going soft or watery. The recipe shows up on menus for the Fourth of July, Memorial Day cookouts, and just about any potluck where a mayo-based side dish is expected to hold up outdoors for a few hours.
That reliability is part of why it’s become a reference point for other potato salad recipes. Ina has a few variations in her catalog, including a French Potato Salad built on vinaigrette instead of mayonnaise, and an herby tarragon version, but this buttermilk-and-mustard recipe is the one home cooks come back to most often.
What type of potato is best for potato salad?
Small white potatoes, red potatoes, new potatoes, or Yukon Golds all work well because they’re waxy and hold their shape after cooking. Starchy potatoes like russets tend to fall apart once mixed with dressing.
Can you make Ina Garten’s potato salad ahead of time?
Yes, it can be made up to a day in advance. In fact, letting it chill for a few hours, or overnight, gives the potatoes more time to absorb the dressing, so the flavor is often better the next day.
Why does the recipe call for dressing the potatoes while they’re warm?
Warm potatoes absorb dressing much more readily than cold ones. Tossing them with the buttermilk mixture right after cooking means the flavor gets into the potato instead of sitting on the surface.
Is Ina Garten’s potato salad gluten-free?
Yes, all of the ingredients in the classic recipe, mayonnaise, buttermilk, mustard, dill, celery, and onion, are naturally gluten-free. Just double-check labels on packaged mustard and mayonnaise if you’re cooking for someone with a gluten allergy.
Whether you’re making this for a weekend cookout or a weeknight side dish, the parboil-and-steam trick is worth remembering well beyond this one recipe. It’s the same principle that keeps potatoes intact in warm potato salads generally, and once you’ve tried it, plain boiled potatoes are hard to go back to. Give it a shot for your next gathering, and don’t be surprised when the bowl comes back empty.
