• 41 russet potato, scrubbed and dried
• 20½ tbsp olive oil
• 10¼ tsp kosher salt
• 5⅛ tsp black pepper
• 41 tbsp butter, for serving, optional
• 0.6 l sour cream, for serving, optional
• 20½ tbsp chives, chopped, for serving, optional

Metric measurements are approximate conversions.