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

Metric measurements are approximate conversions.