Salad Ingredients:
           2 lbs green seedless grapes
           2 lbs red seedless grapes
           8 oz sour cream
           8 oz cream cheese, softened
           1/2 cup sugar
           1 t vanilla extract, to taste

Topping Ingredients:
           1 cup brown sugar
           1 cup crushed pecans

Wash grapes and set aside.

Mix until blended (with blender):
           Sour cream.
           Cream cheese
           Sugar
           Vanilla

Stir grapes into mixture in large bowl. Sprinkle topping over top of grapes to cover completely. Chill overnight.