Make Ahead Mashed Potatoes (Restaurant Trick)

Bahan-bahan (5 porsi)

• 2 lb / 1 kg starchy potatoes ((Note 1))
• 1 cup / 250 ml cream (, half and half or milk (Note 2))
• 60 g / 1/4 cup butter
• Salt and pepper
• Olive oil
• Chives (, finely chopped)
• Pepper