COMBINE flour and salt; set aside. Bring water to full rolling boil in large saucepan. Remove from heat. Add flour mixture; stir until well blended. Cool 5 min.
MEANWHILE, place a medium-size star tip in pastry bag. (Or, use cookie press fitted with star-shaped attachment.) Place dough in pastry bag; squeeze 6-inch lengths of dough onto large sheet of wax paper.
HEAT oil in large deep skillet on medium-high heat. Add half of the dough strips; cook 5 min. or until golden brown, turning occasionally. Drain on paper towels. Repeat with remaining dough strips. Place churros on serving platter; sprinkle evenly with cinnamon sugar. Serve warm.