In a medium saucepan, combine water, butter, brown sugar, and salt. Bring to boiling over medium heat Add flour all at once, stirring vigorously with a wooden spoon. Cook and stir until mixture forms a ball and pulls away from the sides of the pan. Remove from heat. Cool for 10 minutes. Add egg and vanilla, beating well with a wooden spoon.

Transfer mixture to a decorating bag fitted with a large star tip. Line a baking sheet waxed paper. Pipe 4x1-inch logs onto prepared baking sheet.

Heat 3 inches of oil in a deep saucepan to 375 degrees F. Fry a few logs at a time in deep hot oil about 2 minutes or until golden brown on both sides, turning once. Drain on paper towels. Keep warm in a 300 degree F oven while cooking remaining churros.

In a medium bowl, combine granulated sugar and cinnamon. Roll warm churros in cinnamon-sugar mixture to coat. Serve warm. Makes about 20 churros.