Buttermilk Mashed Potatoes

Bahan-bahan (5 porsi)

• 2 lbs yukon gold potatoes (peeled and cubed, about 6 to 7 medium)
• 3/4 cup low fat buttermilk (plus 2 tablespoons)
• 1 tablespoon whipped butter
• kosher salt (to taste)
• dash of fresh ground pepper
• 1/4 cup fresh chives (chopped)