Preheat oven to 350 degrees F (175 degrees C).Grease a 9 inch square baking dish.
In a medium bowl, mix together brown sugar, boiling water, vanilla, and butter.Pour into prepared baking dish.
In a clean bowl, mix together white sugar, flour, milk, baking powder, nuts, and raisins. Drop by spoonfuls on top of the mixture in the baking dish.
Bake in preheated oven for 30 minutes. Serve warm.
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