• 45 russet potato, scrubbed and dried
• 22½ tbsp olive oil
• 11¼ tsp kosher salt
• 5⅔ tsp black pepper
• 45 tbsp butter, for serving, optional
• 0.7 l sour cream, for serving, optional
• 22½ tbsp chives, chopped, for serving, optional

Metric measurements are approximate conversions.