Brown Butter Mashed Potatoes

Bahan-bahan (8 porsi)

• 2 sticks unsalted butter, divided
• 3 pounds potatoes (I use half Yukon Gold, half Russet potatoes)
• 8 large cloves garlic, minced
• fine sea salt and freshly-ground black pepper
• 1 cup whole milk, warmed
• 1 cup freshly-grated Parmesan cheese
• toppings: chopped fresh chives or green onions, freshly-cracked black pepper