Lemon Chess Cake
["1 box yellow cake mix with pudding", "1 stick butter, melted", "1 egg, beaten", "1 Tbsp. lemon flavoring", "1 (8 oz.) pkg. softened cream cheese", "3 eggs", "1 box confectioners sugar", "3 to 5 Tbsp. lemon juice or to taste"]
["Blend butter and 1 egg and mix with cake mix.", "Pat into baking dish (15 x 10-inch)."]
["yellow cake", "butter", "egg", "lemon flavoring", "cream cheese", "eggs", "confectioners sugar", "lemon juice"]