This seems like a variation on your request... ie almonds in place of pistachios etc..
Ask your sister if this seems like the right ingredients and cooking methods.
White Christmas Fudge
Makes 36 squares
2 1/2 cups Domino Confectioners' Sugar
2/3 cup milk
1/4 cup butter or margarine
12 ounces white chocolate, coarsely chopped
1/2 teaspoon almond extract (optional)
3/4 cup dried cherries, cranberries, or apricots, coarsely chopped
3/4 cup toasted almond slices
Line an 8-inch square pan with foil; grease foil. Mix confectioners' sugar
and milk in a heavy 3-quart saucepan. Over medium heat, add butter and,
stirring constantly, bring to boil. Without stirring, boil constantly for
5 minutes. Over low heat, add chocolate and almond extract. Stir, then
whisk until chocolate melts and mixture is smooth. Stir in dried cherries
and toasted almonds. Pour mixture into prepared pan. Refrigerate 2 hours
until firm. Invert pan, peel off foil and cut into 1-inch squares. Garnish
as desired.
TIPS: Look for dried cherries in the bulk foods or produce section of your
supermarket. To toast almonds, spread in a single layer on baking pan.
Bake at 350 degrees F for 5 to 10 minutes, shaking pan occasionally, until
they begin to brown.
Tim
P.S. I can usually find anything on the net but this was a challenge.