Filling For Cupcakes, Whoopie Pies

Ingredients:
- 5 egg whites
- 2 pounds confectioners' sugar
- 1 teaspoon vanilla
- 1 cup shortening
- 7 ounces marshmallow creme

Directions:
- Beat egg whites.
- Add confectioners sugar and vanilla.
- Mix well.
- Add shortening.
- Fold in marshmallow creme.