Cut potatoes into 1" chunks.: When you cut the potatoes into approximately 1 inch chunks you create pieces that cook evenly and hold their shape. You should feel a solid, slightly yielding texture as you slice, and the exposed surfaces will take up dressing well. A common mistake is cutting unevenly, which leads to some pieces overcooking and others undercooking, so aim for uniformity. Use a sharp knife and steady hand to avoid tearing the skins, and place finished chunks in a bowl of cold water if you need to pause to prevent browning.
Place in a 4 qt saucepan, cover with water and bring to boil over medium-high heat. Reduce heat to low and simmer potatoes until fork tender but still hold their shape. Drain and let cool.: As the water comes to a rolling boil you will hear a steady, lively sound and see bubbles rapidly breaking the surface, which signals full heat. Bringing the pot up to heat with enough water to cover the potatoes ensures even cooking. Avoid cranking the heat so high that the water violently splashes, because that can bruise the pieces and make the pot harder to manage. A classic oversight is starting with too little water, which leads to uneven cooking, so cover the pieces completely and keep an eye on the pot.
If using the Instant Pot: add one cup of water to the pot. Place steam basket inside the Instant Pot. Arrange cut potatoes in basket. Place eggs on top. Cover pot with lid. Set valve to sealing. Press Manual, set timer to 5 minutes. When Instant Pot beeps, let manual release for 5 minutes. Quick release the rest. Carefully remove eggs from Instant Pot onto a bowl filled with cold water. Remove potatoes from Instant Pot. Let cool.: When simmering, listen for a gentle, steady bubbling and watch the potatoes lightly jostle but not break apart. Test doneness by piercing a chunk with a fork; it should slide in with slight resistance, not fall apart. Drain promptly to stop the cooking and spread the potatoes on a tray to cool slightly, which helps them absorb dressing without becoming watery. Overcooking is the main mistake here, resulting in mushy salad, so check early and often.
In a large serving bowl, combine potatoes, chopped eggs and chopped pickles.: add one cup of water to the pot. Place steam basket inside the Instant Pot. Arrange cut potatoes in basket. Place eggs on top. Cover pot with lid. Set valve to sealing. Press Manual, set timer to 5 minutes. When Instant Pot beeps, let manual release for 5 minutes. Quick release the rest. Carefully remove eggs from Instant Pot onto a bowl filled with cold water. Remove potatoes from Instant Pot. Let cool. : The pressure method offers a fast, hands off approach where you will notice the faint, steamy scent when you release the valve and lift the lid. Placing the potatoes in a steam basket avoids waterlogging and keeps their texture intact. The cold water bath for the eggs stops cooking and makes peeling easier; you will hear the soft hiss of steam and see condensation settle on the lid. A common error is skipping the cold water bath, which can lead to overcooked yolks and tougher whites, so be sure to chill the eggs quickly after pressure cooking.
In a small mixing bowl or a measuring cup, mix together mayo, sour cream, pickle juice, dill and salt and pepper. Pour dressing over potatoes. Toss gently to coat.: As you fold these elements together you will notice the contrast between warm, tender potatoes , the creaminess of the chopped eggs , and the crisp, tangy bite of the chopped dill pickle spears . The aroma at this stage is savory with a bright, vinegary note from the pickles. Gently toss to keep the texture intact, because vigorous stirring can mash the potatoes . Avoid adding the dressing while the potatoes are piping hot, as that can thin the dressing and make the salad watery.
Cover and chill in the fridge for 1 to 2 hours.: The dressing should be creamy and slightly tangy, with a balanced aroma of dill and pickle brine. Whisk until smooth so it coats evenly, and pour over the bowl so you can fold rather than smash. The dressing will cling to the slightly warm potatoes , absorbing into their surface for better flavor. A frequent issue is over seasoning, since pickles contribute sodium, so taste before adding extra salt.
Cover and chill in the fridge for 1 to 2 hours.: Chilling allows the flavors to marry and the dressing to firm slightly, creating a cohesive, chilled salad. In the fridge you will lose some of the sharp top notes but gain depth, as the dill and pickle juice mellow into the creamy base. For best texture, cover to prevent drying and chill on a flat surface so the dressing distributes evenly. Avoid freezing, because cold will break the emulsion and change the texture dramatically.