Topping: For Topping, Mix Sugars, Cinnamon And Flour. Cut In Butter Until Mixture Is Crumbly. Cake: To Make Cake, Mix 1 Cup Flour, Sugar, Salt And Yeast In A Large Bowl. Place Milk And Butter In A Sauce Pan And Heat Until Very Warm (120 To 130 Degrees F). Gradually Add To Dry Ingredients; Beat 2 Minutes. Beat In Egg And 1 Cup Flour. Beat On High Speed For 2 Minutes. Stir In Enough Flour To Make A Soft But Stiff Batter. Spread Batter Into A Well-Greased 9-Inch Square Cake Pan. Sprinkle With Topping. Let Rise In A Warm Place Until Double In Bulk, About 1 1/2 Hours. Bake At 350 Degrees F. About 45 Minutes Or Until Done. Makes 1 9-Inch Square Cake.