Easy Ricotta Cheese Cake
["1 Duncan Hines yellow cake mix", "1 (No. 2) container Ricotta cheese", "1 c. sugar", "4 eggs", "1 tsp. lemon extract"]
["Make cake as directed.", "Grease and flour 9 x 13 cake pan. Pour cake into the pan.", "Mix remaining ingredients and pour over cake batter.", "Bake 1 hour at 350\u00b0.", "Refrigerate."]
["Ricotta cheese", "sugar", "eggs", "lemon extract"]