Press thawed hash browns into 12 greased muffin cups. Be sure to press potatoes into the sides and bottoms of the pan. Bake for 20 minutes or until golden brown.
While potatoes are cooking, melt butter, add eggs, milk and salt and cook until mostly cooked and no liquid remains
Add chopped bacon and 1 cup cheese and cook an additional minute or so.
Spoon egg mixture into the potato cups, sprinkle with cheese and bake for 5 more minutes. Let cool 5-10 minutes before removing from muffin cups.