Combine the water, butter, and salt in a 2-qt/1.92-L saucepan and bring to a rolling boil. Add the flour to the boiling water, stirring vigorously with a wooden spoon over low heat until the mixture forms a ball and a white layer is appearing on the bottom of the pan, 1 to 3 minutes.
Transfer the hot dough ball to a dough mixer with a paddle attachment and mix