Preheat oven to 375 degrees. Wash potatoes and poke with a fork. Bake potatoes in oven 1 hour or microwave until soft. Allow to cool slightly.
Slice each potato in 1/2 lengthwise. Scoop out the pulp of the potato leaving a 1/8" shell.
In a bowl, mash potatoes, sour cream, butter, garlic powder, salt and pepper until smooth. Add butter milk as needed to create a creamy texture. Stir in chives, bacon and 3/4 cup cheddar cheese.
(Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.)