Fry sausage in a large skillet, 6-7 minutes, drain.
Fry bacon until crispy; drain. Cut bacon into small pieces.
Combine sausage, bacon and cheese together.
Whisk eggs, egg whites and milk in a bowl. Divide the egg mixture evenly among the prepared muffin cups. Sprinkle a tablespoon of the sausage, bacon and cheese mixture into each cup. Bake until the tops are beginning to brown, around 30-35 minutes.
Let cool on wire rack for 5 minutes.