FILLING:

1/2 c. shortening
1/2 c. confectioners' sugar
1/2 c. marshmallow fluff
2-3 tsp. soft butter
1 tsp. vanilla

Mix well. Preheat oven to 350 degrees.

CAKE:

1 chocolate cake mix - make as directed

Grease 2 cookie sheets. Pour half the batter in each sheet. Bake at 350 degrees for 10-15 minutes. Spread filling on one sheet of cake. Put the other sheet on top. Delicious kept in refrigerator. Enjoy!