• 15 russet potato, scrubbed and dried
• 7½ tbsp olive oil
• 3¾ tsp kosher salt
• 1¾ tsp black pepper
• 15 tbsp butter, for serving, optional
• 220 ml sour cream, for serving, optional
• 7½ tbsp chives, chopped, for serving, optional

Metric measurements are approximate conversions.