• 61 russet potato, scrubbed and dried
• 30½ tbsp olive oil
• 15¼ tsp kosher salt
• 7⅔ tsp black pepper
• 61 tbsp butter, for serving, optional
• 0.9 l sour cream, for serving, optional
• 30½ tbsp chives, chopped, for serving, optional

Metric measurements are approximate conversions.