Prep Time 15 minutes mins
Cook Time 20 minutes mins
Total Time 35 minutes mins
2 lbs purple potatoes
4 tablespoons unsalted butter
1/2 cup whole milk (or plant-based milk)
Salt, to taste
Freshly ground black pepper, to taste
1/4 cup sour cream or Greek yogurt (optional)
Fresh herbs for garnish (parsley or chives)