preheat oven to 375

with an electric mixer, beat egg, butter & vanilla until light & creamy.

in another bowl, mix cocoa, baking soda, salt & flour, then blend with buttermilk into the creamed mixture

drop batter by the heaping teaspoon onto greased baking sheets& bake 7 to 9 mom. remove from baking sheets & cool on wire racks. makes 30 mini cakes

to make the filling, mix together all ingredients well

to assemble, sandwich a heaping tbs of cream between 2 cakes dividing cream between 15 whoopie pies