Prick the potatoes with a fork and microwave them in batches until tender, about 7 to 8 minutes. Once cool enough to handle, scoop out the flesh.
In a large saucepan, melt the butter over medium heat. Stir in the flour and cook for about a minute. Gradually whisk in the milk, ensuring it's constantly stirred until thickened.
Add the cooked potatoes, salt, pepper, 1/3 cup bacon bits, 2 tablespoons green onions, and most of the cheese to the saucepan. Heat until thoroughly warmed through. Stir in the sour cream and warm for a further minute.
Serve the soup topped with the remaining bacon, onions, and cheese.
Discover amazing recipes from around the world