COMBINE water, butter, 1/4 cup sugar (or 2 Tbsp. sugar for trial recipe) and salt in saucepan. Bring to boil on medium-high heat. Add flour; cook and stir until mixture pulls away from side of pan. Transfer to a bowl.
ADD eggs, 1 at time, beating after each until well blended. Stir in vanilla. Spoon into pastry bag fitted with large star tip. (Or spoon into churros maker.)
PIPE 5-inch lengths of dough, in batches, directly into 350ºF deep fryer. Fry until golden brown; drain on paper towels.
COMBINE 2 cups sugar (or 1 cup sugar for trial recipe) and cinnamon. Add warm churros, 1 at a time, tossing until coated.
SERVE 1 churro with about 2 Tbsp. DELIGHTS.