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Preheat oven to 300* and line a baking sheet with parchment paper.
Cream butter and sugar until fluffy.
Stir in water and vanilla.
Add flour gradually until everything is mixed.
Roll dough into balls and place on baking sheet. Flatten by hand if you want.
Bake for 18-20 minutes, or until done.
While cookies are still hot out of the oven, roll them in powdered sugar until coated on all sides and set aside to cool.