• 25 russet potato, scrubbed and dried
• 12½ tbsp olive oil
• 6¼ tsp kosher salt
• 3⅛ tsp black pepper
• 25 tbsp butter, for serving, optional
• 0.4 l sour cream, for serving, optional
• 12½ tbsp chives, chopped, for serving, optional

Metric measurements are approximate conversions.