1. Prepare the Crust:

1. Preheat oven to 375°F (190°C). Grease a muffin tin or line with paper liners.
2. In a medium saucepan, bring water and butter to a boil over medium heat.
3. Reduce heat to low and add flour, salt, and sugar all at once. Stir vigorously until the mixture forms a ball and pulls away from the sides of the pan.
4. Remove from heat and let cool slightly. Add eggs one at a time, beating well after each addition until the dough is smooth and glossy.
5. Spoon the dough into the prepared muffin tin, filling each cup about 3/4 full.
6. Bake for 25-30 minutes or until puffed and golden brown. Do not open the oven door during baking.
7. Remove from oven and let cool slightly. Dust with powdered sugar before serving.