Mashed Potatoes for a Crowd

Ingredients

• 8 lb Yukon Gold or russet potatoes
• 1 1/2 tbsp table salt
• 4 bay leaves
• 1/3 lb unsalted butter
• 2 cups half and half, cream or whole milk
• 1 tbsp kosher salt
• 1/2 tsp ground white pepper
• 1/2 tsp freshly grated nutmeg
• 1/4 cup unsalted butter