Twice Baked Potatoes

Name: Twice Baked Potatoes
Prep time: 15 min
Cook time: 1 h 15 min
Total time: 1 h 30 min
Cuisine: American
Ingredients: 6 small russet potatoes (or baking potatoes); ⅓ cup sour cream; ¼ cup salted butter; ½ teaspoon garlic powder; ½ teaspoon salt (or to taste); ¼ teaspoon black pepper (or to taste); ½ cup warm milk (or buttermilk, if needed); 6 slices bacon (cooked and crumbled, or 3 tablespoons bacon bits, additional for serving (optional)); 1 tablespoon chopped fresh chives (or green onions, additional for serving); 1 ½ cups shredded sharp cheddar cheese (divided)