1/3 cup brown sugar
¼ cup milk
1 cup flour
1 tsp cream of tartar
½ tsp soda (or replace above two with 1 ½ tsp baking powder)
½ tsp vanilla

Beat & put in buttered baking dish. Mix & pour over cake batter:

¾ cup brown sugar
2 cup boiling water

Bake 25 min @ 350.