In 2-quart casserole dish, combine soup mix and water.
Heat, covered with glass lid, at high5 to 6 minutes and at medium-LOW 5 minutes; stir once.
Blend flour with milk.
Stir in milk and cheese.
Heat, covered, at medium-LOW 5 to 7 minutes, or until soup is thickened and cheese is melted; stir once.