Sour Cream and Onion Potato Salad tastes creamy, tangy, and a little bit nostalgic, like your favorite chip flavor jumped into a bowl of tender potatoes. It works perfectly for potlucks, weeknight dinners, and cookouts, and you can finish the whole recipe in about 40 minutes. I grew up bringing some version of this to every family barbecue, and my relatives still text me for the “secret” even though I keep telling them it lives in the dressing.
Why Make This Sour Cream and Onion Potato Salad at Home
Homemade sour cream and onion potato salad gives you real onion flavor, bright herbs, and a creamy dressing that actually clings to the potatoes. You control the salt, the tang, and the texture, so the salad never turns gluey or bland.
You also skip mystery ingredients and use pantry staples you already trust. Leftovers taste even better the next day, so you get an easy side dish that keeps paying off.
“This sour cream and onion potato salad tastes like the best part of a cookout in one bowl, and everyone asks for seconds.” ★★★★★
Ingredients You Need
Potatoes
- 2 pounds baby gold potatoes, scrubbed
- Baby golds hold their shape and stay creamy inside.
- Yukon golds or small red potatoes also work and keep a nice texture.
Dressing
- 1 cup sour cream
- Use full-fat for the best flavor and body.
- Greek yogurt can replace up to half the sour cream if you want more protein and tang.
- 1/3 cup mayonnaise
- Duke’s or Hellmann’s both give a rich, balanced flavor.
- Use all sour cream if you avoid mayo, but add a pinch of sugar and extra salt to round the flavor.
- 2 tablespoons buttermilk or regular milk
- This loosens the dressing so it coats the potatoes.
- 1 tablespoon Dijon mustard
- 1 1/2 teaspoons kosher salt, plus more to taste
- 1 teaspoon freshly ground black pepper
- 1 teaspoon onion powder
- 1 teaspoon garlic powder
- 1 teaspoon sugar or honey
- 2 tablespoons finely minced fresh chives
- 2 tablespoons finely minced green onion (both white and green parts)
- 1 tablespoon finely minced fresh parsley or dill
Onion component
- 1/2 cup very finely minced yellow onion
- Soak in cold water for 10 minutes if you want a milder bite.
- 2 tablespoons neutral oil or butter
- Use avocado, canola, or light olive oil for sautéing.
Crunchy mix-ins (optional but tasty)
- 2 ribs celery, very finely diced
- 1/3 cup finely diced dill pickles or pickle relish
- 2 hard-boiled eggs, chopped (optional, for a more classic deli vibe)
Pantry shortcuts and flavor boosters
- 1–2 tablespoons ranch seasoning or onion soup mix
- Stir a little into the dressing if you want extra onion-chip flavor.
- A splash of pickle brine or white vinegar for extra tang
- Extra chives and green onions for garnish
Equipment
- Large pot for boiling potatoes
- Colander
- Large mixing bowl
- Small skillet for the onion
- Sharp knife and cutting board
- Rubber spatula or wooden spoon
- Measuring cups and spoons
Tips & Mistakes
- Cut potatoes into equal bite-size chunks so they cook at the same rate.
- Start potatoes in cold, salted water so they cook evenly and absorb seasoning.
- Stop cooking when potatoes feel tender but still hold their shape; mushy potatoes turn the salad pasty.
- Drain potatoes well and let steam escape so water does not thin the dressing.
- Dress potatoes while they still feel warm so they soak up flavor.
- Chill the salad at least 30 minutes before serving so flavors blend.
- Taste again after chilling and adjust salt, acid, and herbs; cold food needs bolder seasoning.
- Use full-fat sour cream and mayo for the best texture; low-fat versions can separate.
- Avoid overmixing; fold gently so potatoes stay chunky, not mashed.
- Add crunchy ingredients like celery and pickles at the end so they stay crisp.
How to Make Sour Cream and Onion Potato Salad
Step 1: Cook the potatoes
Place the scrubbed potatoes in a large pot and cover them with cold water by about 1 inch. Add 1 tablespoon kosher salt to the water. Bring the pot to a gentle boil over medium heat and cook until a fork slides into the potatoes with slight resistance, about 10 to 15 minutes depending on size. Drain in a colander and let the potatoes sit 5 to 10 minutes so steam escapes and surfaces dry.
Cut the warm potatoes into bite-size chunks if you did not cut them before cooking. Transfer them to a large mixing bowl. Sprinkle a pinch of salt and a small splash of pickle brine or vinegar over the warm potatoes and toss gently. This step seasons the potatoes from the inside out.
Step 2: Sauté the onion
Heat the oil or butter in a small skillet over medium heat. Add the finely minced yellow onion and a pinch of salt. Cook, stirring often, until the onion turns soft and lightly golden around the edges, about 6 to 8 minutes. Remove from heat and let the onion cool slightly.
Step 3: Mix the sour cream and onion dressing
In a medium bowl, whisk together sour cream, mayonnaise, buttermilk, Dijon, salt, pepper, onion powder, garlic powder, and sugar or honey. Stir in the sautéed onion, chives, green onion, and parsley or dill. Taste and adjust with more salt, pepper, or acid if needed. If you want stronger onion flavor, add a teaspoon or two of ranch seasoning or onion soup mix and whisk again.
Step 4: Combine potatoes and dressing
Pour about two thirds of the dressing over the warm potatoes. Gently fold with a spatula until the potatoes look coated but not swimming in sauce. Add celery, pickles, and chopped eggs if you use them, then fold again. Add more dressing as needed until the salad reaches your preferred creaminess.
Step 5: Chill and finish
Cover the bowl and chill the sour cream and onion potato salad for at least 30 minutes, or up to 24 hours. Before serving, stir the salad, then taste and adjust seasoning with more salt, pepper, or a splash of vinegar. Sprinkle extra chives and green onion on top for a fresh, bright look. Serve cold or cool, not straight from the back of the fridge.
Variations I've Tried
- Extra-onion version: Double the sautéed onion and add more green onions and chives. This version tastes closest to sour cream and onion chips in salad form.
- Bacon and cheddar: Add crisp crumbled bacon and shredded sharp cheddar, then top with extra green onions. This turns the salad into a loaded baked potato situation.
- Herb-forward version: Add more dill and parsley, and skip the pickle relish. The salad tastes fresher and lighter, with a strong garden herb vibe.
- Greek yogurt twist: Use half sour cream and half Greek yogurt, then add a bit more olive oil and honey to balance the tang. This version tastes bright and creamy but slightly lighter.
How to Serve Sour Cream and Onion Potato Salad
Serve sour cream and onion potato salad chilled or at cool room temperature beside grilled chicken, burgers, hot dogs, or veggie skewers. It also pairs nicely with sandwiches like turkey, ham, or a crunchy veggie stack. Pack it into lunch boxes with sliced cucumbers, cherry tomatoes, and fruit for a full meal. If you host a party, spoon it into a shallow bowl and top it with extra chives so it looks as good as it tastes.
How to store
- Store leftovers in an airtight container in the fridge for up to 4 days.
- Stir the salad before serving again, and add a spoonful of sour cream or mayo if it looks dry.
- Avoid freezing, since potatoes and sour cream change texture and turn grainy after thawing.
- Serve leftovers cold straight from the fridge, or let the salad sit on the counter 15 to 20 minutes to take the chill off before eating.
Sour Cream and Onion Potato Salad
Ingredients
Instructions
- Place the scrubbed potatoes in a large pot and cover with cold water by about 1 inch. Add 1 tablespoon kosher salt to the water, bring to a gentle boil over medium heat, and cook until a fork slides into the potatoes with slight resistance, about 10 to 15 minutes depending on size.
- Drain the potatoes in a colander and let them sit 5 to 10 minutes so steam escapes and the surfaces dry. If not already cut, slice the warm potatoes into bite-size chunks and transfer to a large mixing bowl.
- Sprinkle a pinch of salt and a small splash of pickle brine or vinegar over the warm potatoes and toss gently to season them.
- Heat the oil or butter in a small skillet over medium heat. Add the finely minced yellow onion and a pinch of salt. Cook, stirring often, until the onion is soft and lightly golden around the edges, about 6 to 8 minutes. Remove from heat and let cool slightly.
- In a medium bowl, whisk together the sour cream, mayonnaise, buttermilk, Dijon mustard, kosher salt, black pepper, onion powder, garlic powder, and sugar or honey until smooth.
- Stir the sautéed onion, chives, green onion, and parsley or dill into the dressing. Taste and adjust seasoning with more salt, pepper, or a splash of vinegar if needed. For a stronger onion flavor, whisk in ranch seasoning or onion soup mix.
- Pour about two thirds of the dressing over the warm potatoes. Gently fold with a spatula until the potatoes are evenly coated but not swimming in sauce.
- Add the celery, dill pickles or pickle relish, and chopped hard-boiled eggs if using, then fold gently to combine. Add more dressing as needed to reach your preferred creaminess.
- Cover the bowl and chill the potato salad for at least 30 minutes, or up to 24 hours, to let the flavors blend.
- Before serving, stir the salad, taste, and adjust seasoning with more salt, pepper, or vinegar. Garnish with extra chives and green onions and serve chilled or cool.
Notes
Approximate per serving (8 servings, made with sour cream, mayonnaise, milk, and without optional bacon or cheese): 260 calories; fat 17 g; saturated fat 6 g; carbohydrates 24 g; fiber 2 g; sugars 3 g; protein 4 g; sodium 420 mg. Values will vary based on specific ingredients, optional mix-ins, and portion size.
Leave a Reply