Scrub the potatoes well and then cube them into 2-inch chunks. Place the potatoes in a large saucepan, and cover by 1-inch with COLD water. Season the water with 1 tablespoon kosher salt.
Bring the water to a boil over high heat, uncovered. Once boiling, reduce the heat to medium and simmer for 15-18 minutes, uncovered, or until the potatoes are fork-tender.
Once the potatoes are tender, drain them in a colander and then immediately return the potatoes to the hot saucepan. Place over low heat for 1-2 minutes, to absorb any water remaining on the potatoes.
Turn off the heat, add butter, chopped fresh parsley, and ½ teaspoon kosher salt and toss to combine. Taste and add additional salt if necessary. Serve warm.
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Notes
Potatoes: Waxy potatoes with thin skins are best. I prefer red potatoes, but gold, new, or baby potatoes work as well. Parsley: Use fresh curly or flat-leaf parsley, not dried parsley for best results. Butter: While you can use salted butter, I recommend unsalted butter to control the sodium yourself. Feel free to add up to 2 tablespoons of additional butter for a really rich result. Dairy-Free: Use your favorite non-dairy butter.Storage: Store leftovers in an airtight container in the refrigerator for 3-4 days. Reheat in a heat-safe bowl in the microwave.