Instructions

  1. Combine sugar, sour cream and butter in a pan.
  2. Bring mixture to a rolling boil, stirring constantly.
  3. Boil for 7 minutes or until softball stage.
  4. Remove pan from heat and stir in white chocolate until melted.
  5. Add marshmallow cream and walnuts.
  6. Beat by hand until completely blended.
  7. Spread into a greased 9x9 inch baking pan.
  8. Cool at room temperature.