Ultimate Loaded Mashed Potatoes

"Loaded Mashed Potatoes are creamy and buttery, topped with cheddar cheese, bacon and scallions. They’re a breeze to make and perfect for making ahead. Mashed Potatoes and baked potatoes are the ultimate comfort food around here. We love the warm, creamy starchy goodness and adding all the toppings is always a huge hit. One person will usually make a pile of cheese on their plate roughly the size of the potatoes while another will make what looks like a bacon mountain. This used to lead to fights over toppings."