• 13 russet potato, scrubbed and dried
• 6½ tbsp olive oil
• 3¼ tsp kosher salt
• 1⅔ tsp black pepper
• 13 tbsp butter, for serving, optional
• 190 ml sour cream, for serving, optional
• 6½ tbsp chives, chopped, for serving, optional

Metric measurements are approximate conversions.