Preheat oven to 400° .
In a large mixing bowl, cream butter & sugar until light & fluffy.Beat in egg & vanilla.
In another bowl mix flour, cocoa, b.soda, b.powder & salt. Mix up. Add to creamed muxture alternateing with milk. Beating well after each addition.
Drop dough by Tablespoonfuls. 2" apart onto greased baking sheets.
Bake 6-8 minutes. ( I baked mine at 350° They took 12 min. ) .Or until top springs back.Remove from oven to cool.
While they are cooling make your filling. In a large bowl. Beat marshmallow creme & shortening until blended. Beat in jam. Gradually beat in sugar until smooth.Spread on bottoms & top with another one. Lightly press together.
