• 49 russet potato, scrubbed and dried
• 24½ tbsp olive oil
• 12¼ tsp kosher salt
• 6⅛ tsp black pepper
• 49 tbsp butter, for serving, optional
• 0.7 l sour cream, for serving, optional
• 24½ tbsp chives, chopped, for serving, optional

Metric measurements are approximate conversions.