Begin by peeling and dicing your potatoes in medium cubes- add them to a pot of cold water while you are dicing to prevent them from oxidizing.
When your pot is full, make sure water is covering potatoes at least 3 inches atop. Bring pot to a boil.
When pot boils, reduce to a simmer, and simmer potatoes until soft and fork-tender, about 25-35 minutes.
Drain potatoes well and return to empty pot.
Working quickly, add warmed cream and butter, sour cream, granulated garlic, salt and pepper. Mash with a potato masher until mashed well and incorporated- be careful not to overmash or potatoes will get gummy.
Fold in half of: chopped bacon, shredded cheddar, scallions and chives.
Stir well and transfer to serving dish- smoothing top.
Garnish with remaining cheddar, scallions, bacon then chives. Finish with more fresh-cracked black pepper. Serve immediately.
Alternately, you could prepare in advance the day before and bake casserole-style before serving.
Let dish come to room temperature 45 minutes before baking. Heat oven to 400 degrees and bake until warmed through, 35-40 minutes.