Buttermilk Herb Smashed Potato Salad.

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Potato salad that actually feels bright and fresh? Yes. This Buttermilk Herb Smashed Potato Salad is a simple, unfussy way to get tender potatoes with crispy edges, all tossed in a tangy, herb-forward buttermilk dressing. It sits comfortably at a weeknight dinner or a summer picnic — warm, room-temperature, or chilled depending on what you prefer.

There’s nothing mysterious here: baby Yukon Golds, a quick roast to get those delightful craggy bits, and a dressing built from plain Greek yogurt, buttermilk, garlic, Dijon, and plenty of fresh herbs. The technique is forgiving, which makes it great to prep ahead or pull together last minute.

I’ll walk you through the exact steps, what can go wrong, smart swaps, storage tips, and why this one will become a repeat in your rotation. Clear, practical, and reliable — that’s the goal.

The Essentials

This salad balances tender, slightly smashed potatoes with a tangy, herbal buttermilk dressing. You need only a few staples and a hot oven to get crisp edges on the potatoes. Plan on about 45–60 minutes total time with most of that being passive roasting and cooling.

Makes roughly 4–6 servings depending on portion size. Best served the day it’s made but keeps well for a few days refrigerated.

Buttermilk Herb Smashed Potato Salad. — Do This Next

Quick plan before you start

1. Preheat oven to 450°F. 2. Boil the potatoes until just barely fork-tender. 3. Smash and roast until golden and crispy. 4. Whisk dressing while potatoes roast and toss right after roasting so the dressing warms into the potatoes.

Step-by-step instructions

1. Preheat the oven to 450 degrees F and position a rack in the center.
2. Place 2.5 pounds baby Yukon Gold potatoes in a large pot and cover with cold water. Bring to a boil, then reduce to a simmer. Cook until the potatoes are just barely fork tender — a fork should enter with slight resistance, about 12–18 minutes depending on size.
3. Drain the potatoes in a colander and let them cool just enough to handle (you can refrigerate them at this point if doing ahead).
4. Brush a baking sheet with 1 tablespoon olive oil. Arrange the cooled potatoes on the sheet in a single layer.
5. Using your hand or the bottom of a glass, press each potato once to “smash” it while trying to keep it mostly intact. You want the centers to stay connected to create craggy surfaces that crisp up.
6. Drizzle the remaining 1 tablespoon (or 2 tablespoons total — use 1 to 2 tablespoons as needed) olive oil over the smashed potatoes. Sprinkle a pinch of kosher salt and pepper evenly over them.
7. Roast the potatoes in the preheated oven for 25 to 30 minutes, until golden and crispy on the edges.
8. While the potatoes roast, make the dressing: In a bowl whisk together 1/4 cup plain Greek yogurt, 1/3 cup buttermilk, 2 minced or pressed garlic cloves, 2 teaspoons Dijon mustard, 2 tablespoons chopped fresh chives, 2 tablespoons chopped fresh dill, and a pinch of kosher salt and pepper. Taste and adjust salt and pepper if needed.
9. Remove the potatoes from the oven and let them cool slightly for a couple of minutes. Transfer them to a large bowl and pour the dressing over while the potatoes are still warm. Toss gently to coat so the dressing clings into the potato crevices.
10. Add a few extra handfuls of fresh herbs (chives and dill) and toss again. Taste and add more salt and pepper if needed — seasoning often depends on how salty they were before roasting.
11. Serve immediately warm, or allow to cool to room temperature and serve chilled. Leftovers keep well in the fridge for 3–5 days and can be reheated if you prefer them warm.

Why You’ll Keep Making It

This recipe is forgiving: the smashed-roast method gives texture without precise shaping, and the buttermilk-yogurt dressing keeps the salad bright. It pairs with grilled meats, picnic spreads, or as a simple main with a crisp salad. The fresh herbs elevate ordinary potatoes into something you want to repeat.

Texture-Safe Substitutions

• Potatoes: If you can’t find baby Yukon Golds, use small red potatoes; they hold shape similarly. Avoid floury Russets here — they can fall apart more easily.
• Dressing base: If you don’t have plain Greek yogurt, use the same amount of sour cream mixed with a bit more buttermilk to reach the same pourable consistency.
• Buttermilk: If you don’t have buttermilk, mix 1/3 cup milk with 1 teaspoon vinegar or lemon juice and let sit 5 minutes—use that in place of the buttermilk.
• Herbs: If you don’t have dill, swap with flat-leaf parsley for freshness; chives can be swapped with thinly sliced green onions.

Gear Checklist

• Large pot — for boiling potatoes.
• Colander — to drain potatoes.
• Rimmed baking sheet — for roasting smashed potatoes.
• Small bowl and whisk — to make the dressing.
• Large mixing bowl — to combine potatoes and dressing.
• Flat-bottomed glass or a firm palm — to smash the potatoes.

Things That Go Wrong

Under- or overcooked potatoes

If potatoes are undercooked they will fall apart when smashed; if overcooked they’ll become mushy. Check for “just barely fork tender” — a fork should meet light resistance.

No crisp edges

Too much moisture on the potatoes or overcrowding the pan will prevent browning. Pat the potatoes dry after draining and don’t overlap them on the sheet.

Blah dressing

Taste the dressing before tossing. The garlic, Dijon, and fresh herbs are the punch — adjust salt, pepper, or herb amounts to suit your palate.

Make It Year-Round

Use it warm in winter as a cozy side with roasted chicken, or chilled in summer next to grilled fish and veggies. Swap herbs seasonally: add tarragon in spring, parsley in colder months, or basil in summer (reduce dill if using basil to avoid clashing flavors).

Notes on Ingredients

Ingredients

• 2.5 pounds baby Yukon Gold potatoes — tender, thin-skinned potatoes that roast well and hold together when smashed.
• 1 to 2 tablespoons olive oil — used for brushing the baking sheet and drizzling over potatoes for crisping; adjust within range based on potato amount and pan size.
• pinch of kosher salt and pepper — seasoning for roasting; you’ll also adjust later after tossing with dressing.
• ¼ cup plain Greek yogurt — gives body and tang to the dressing while keeping it creamy without heaviness.
• ⅓ cup buttermilk — thins the dressing and adds bright acidity.
• 2 garlic cloves, minced or pressed — adds savory bite; adjust to taste if you prefer milder garlic.
• 2 tablespoons chopped fresh chives, plus more for garnish — fresh oniony note and color; save some to sprinkle on at the end.
• 2 tablespoons chopped fresh dill, plus more for garnish — bright, herbaceous flavor that pairs beautifully with potatoes and buttermilk.
• 2 teaspoons Dijon mustard — lends acidity and depth to the dressing while helping it emulsify.
• pinch of kosher salt and pepper — seasoning in the dressing; final seasoning after tossing is important.

Cooling, Storing & Rewarming

Cool: Let the roasted potatoes cool slightly before tossing with dressing so they absorb flavor but don’t wilt the herbs.

Store: Keep leftovers in an airtight container in the refrigerator for 3–5 days. The dressing will mellow and the herbs soften over time.

Reheat: To revive crisp edges, spread leftovers on a baking sheet and re-crisp at 400°F for about 8–10 minutes. You can also microwave portions for a quick warm serving; texture will be softer.

Ask & Learn

Q: Can I make the dressing fully ahead? A: Yes. Whisk it up to a day ahead and keep chilled. Fresh herbs are best added near serving for brightness.

Q: Can I use a different potato size? A: Larger potatoes will take longer to boil and roast; adjust times accordingly and aim for “just barely fork tender” before smashing.

Q: Is there a dairy-free option? A: Use a dairy-free yogurt and an acidified plant milk as a buttermilk substitute; texture and tang will differ slightly.

Ready to Cook?

Gather your potatoes, herbs, and a hot oven. Follow the step-by-step above: boil until barely tender, smash, roast until golden, whisk the buttermilk-herb dressing while they roast, and toss immediately after roasting. Taste and adjust seasoning. This is straightforward, forgiving, and reliably delicious — enjoy.

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