Wash whole potatoes and place in a large pot. Cover with 1.5 inches of cold water and bring to a boil. Add 1 teaspoon of salt per 4 cups of water. Reduce heat and simmer for 12–17 minutes, until easily pierced with a fork.
Fill a large bowl with ice and cold water. Drain cooked potatoes and add to ice bath. Once cooled, drain and chop into 1-inch chunks. Place in a bowl, drizzle with 1/2 tablespoon apple cider vinegar, add a pinch of salt, toss, and set aside.
In a medium bowl, combine remaining 1/2 tablespoon apple cider vinegar, mayo, sour cream, pickle relish, mustard, celery seed, paprika, plus salt and pepper to taste (I add 1/2 teaspoon salt and 1/4 teaspoon pepper). Whisk until smooth.
Coarsely chop hard-boiled eggs (see note 2), and finely chop celery, pickles, and onion. Add in a large bowl with potatoes. Pour dressing over dish and gently stir. Cover and refrigerate for at least 1 hour up to 8 hours. Garnish with chives or parsley if desired.
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Notes
Note 1: I leave the peel on Yukon gold potatoes for texture and color since the skin is so thin. If using large potatoes, quarter them before boiling. Avoid using russet potatoes.Note 2: To save time, you can buy hard-boiled eggs at the store. Otherwise, check out these instructions for how to hard boil the eggs.Storage: Store in an airtight container in the fridge for 5–7 days. I don’t recommend freezing this recipe as it can result in changes in texture and quality upon thawing.