Scrub and dry potatoes, then prick several times with a fork and place on a microwave-safe plate. Heat in microwave on high until tender, 18 to 20 minutes; remove and allow to cool for 10 minutes.
Step 2
Combine Neufchatel cheese and milk in a small bowl; beat in salad dressing mix.
Step 3
Cut potatoes in half lengthwise; remove pulp, leaving a thin potato skin shell. Mix pulp into cheese mixture and mash. Spoon mixture into potato shells; sprinkle with Cheddar cheese.
Step 4
Place two potatoes on a microwave-safe plate. Heat in microwave on high until heated through and cheese is melted, 3 1/2 to 4 1/2 minutes.
