Preheat oven to 400°F. Line two baking sheets with parchment or silicone baking mats.
In a small bowl, combine flour, salt, and sugar.
In a heavy-bottomed saucepan over medium heat, bring milk and butter to a boil.
Immediately add all the flour mixture at once, and stir with a wooden spoon until a dough forms. Keep stirring for about another minute, or until the dough comes off the sides and bottom of the pan. Remove from heat.
Let stand 2 minutes to cool slightly, then, one at a time, rapidly stir in the eggs, stirring until the dough is no longer glossy before adding the next egg.
Place dough in a piping bag fitted with a large star tip and pipe 1-inch mounds of dough about 2 inches apart.
Bake for 10 minutes, then reduce the oven temperature to 350°F and bake about 25 minutes longer.
Cool completely on baking sheets.