Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
                        ***CRUST***
   1 1/2  cups          graham cracker crumbs
     1/4  cup           granulated sugar
     1/3  cup           butter or margarine -- melted
                        ***CHEESECAKE***
   3      3 oz pkgs     cream cheese -- softened
   1      cup           granulated sugar
     1/4  cup           light brown sugar
   1 3/4  cups          sweet potatoes -- mashed
   2                    eggs
     2/3  cup           evaporated milk -- undiluted
   2      tablespoons   cornstarch
     1/4  teaspoon      ground cinnamon
     1/8  teaspoon      ground nutmeg
                        ***TOPPING***
   2      cups          sour cream -- room temperature
     1/3  cup           granulated sugar
   1      teaspoon      vanilla extract

Preparation:

Crust: Combine crumbs, sugar, and butter in bowl. Press onto bottom and 1 inch up on sides of 9 inch springform pan. Bake at 350 degrees for 6 to 8 minutes. Do not allow to brown. Remove from oven and cool. Cheesecake: Beat cream cheese, sugar and brown sugar in large bowl. Beat in sweet potatoes, eggs, and milk. Add cornstarch, cinnamon and nutmeg. Beat well. Pour into crust. Bake at 350 degrees for 55 to 60 minutes or until edge is set. Topping: Combine sour cream, sugar and vanilla. Spread over warm cheesecake. Return to 350 degree oven and bake 5 minutes. Cool on wire rack. Remove side of pan and chill several hours or overnight.