Preheat oven to 400 degrees.Wash and dry potatoes.Rub them lightly with a bit of shortening or vegetable oil (helps crisp the skin) and place directly on oven rack, or a cookie sheet.Bake for one hour or until potatoes are done.
Remove potatoes and let cool just a bit. Cut an opening on the top and hollow out each potato, OR cut each potato in half (as shown in photos) to make 8 servings.You may want to hold them with a potholder as they will still be hot!
Scoop out the insides and place in a bowl. Mash, and add butter, sour cream, bleu cheese, milk, salt, pepper, and garlic. Beat with a hand mixer until fluffy. Carefully spoon mixture back into potato shells. Place in a baking dish. Return to hot oven and bake for 12-15 minutes.
Remove and sprinkle bacon and cheddar cheese over each potato and bake an additional 3-5 minutes or until cheese is melted and bubbly