When the potatoes have cooled enough to handle, scoop out the white flesh and place in a bowl. Discard skins.
Using an electric mixer, mash the potatoes until smooth
Add butter, sour cream, and milk. Mix to combine.
Add salt, pepper, and about 1 tablespoon of the bacon bits. Mix or stir to combine.
Spoon the potato mixture into a 2-quart casserole dish that has been sprayed with cooking spray. Spread the mixture evenly in the dish.
Sprinkle the remaining bacon bits, shredded cheese, and green onion tops over the potato mixture.
Bake at 350 degrees for about 15 minutes or until the cheese begins to melt.
Recipe Tips
It is not necessary to poke holes in the potatoes; in fact, if you don't they will be light and fluffy. Only potatoes that are overcooked explode in the oven.