Created by QueenBea on March 17, 2014
Step 1: Preheat oven to 350 Fahrenheit. Pierce the potatoes a few times with fork. Place directly on the center oven rack and bake until tender, about 1 hour. Let cool slightly.
Step 2: Increase the oven temperature to 450 Fahrenheit. Halve the potatoes lengthwise and scoop out the flesh, leaving a 1/4 inch-thick shell; reserve half of the flesh in a bowl (save the rest for another use). Brush both sides of the potato skins with 2 tbsp melted butter and season with salt and pepper. Arrange skin-side upon a baking sheet and bake until crisp, about 15 mins.
Step 3: Meanwhile, mash the potato flesh with a fork; mix in the cheddar, Muenster, Parmesan, 2 tbsp horseradish and the remaining 1 tbsp melted butter. Stuff into the potato skins, return to the oven and continue baking until golden brown, about 8 mins.
Step 4: Mix the sour cream with the remaining 1-2 tbsp horseradish. Spoon on the potato skins and sprinkle with the scallions.