Cheese Puffs

Description
These are great!
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1 cup milk
 * ¼-pound (1 stick) unsalted butter
 * 1 teaspoon kosher salt
 * ⅛ teaspoon freshly ground black pepper
 * pinch nutmeg
 * 1 cup all-purpose flour
 * 4 extra-large eggs
 * ½ cup grated gruyère, plus extra for sprinkling
 * ¼ cup freshly grated Parmesan
 * 1 egg beaten with 1 teaspoon water, for egg wash

Directions

 * 1) Preheat the oven to 425°F.
 * 2) Line 2 baking sheets with parchment paper.
 * 3) In a saucepan, heat the milk, butter, salt, pepper, and nutmeg over medium heat, until scalded.
 * 4) Add the flour all at once and beat it vigorously with a wooden spoon until the mixture comes together.
 * 5) Cook, stirring constantly, over low heat for 2 minutes.
 * 6) The flour will begin to coat the bottom of the pan.
 * 7) Dump the hot mixture into the bowl of a food processor fitted with the steel blade.
 * 8) Immediately add the eggs, gruyère, and Parmesan and pulse until the eggs are incorporated and the dough is smooth and thick.
 * 9) Spoon the mixture into a pastry bag fitted with a large plain round tip.
 * 10) Pipe in mounds 1¼ inches wide and ¾-inch high onto the baking sheets.
 * 11) With a wet finger, lightly press down the swirl at the top of each puff (you can also use 2 spoons to scoop out the mixture and shape the puffs with damp fingers).
 * 12) Brush the top of each puff lightly with egg wash and sprinkle with a pinch of gruyère.
 * 13) Bake for 15 minutes, or until golden brown outside but still soft inside.