4ouncescream cheese,softened and whipped with a little heavy cream if desired
Preheat the oven to 325ºF. Butter an 8x8 inch baking pan.
Melt the chocolate, butter, and brown sugar in a large sauce pan over low heat. Remove from the heat, add the vanilla and eggs and combine. Add the flour, baking powder, and salt and whisk until smooth. Gently fold in spoonfuls of the cream cheese, allowing it to marble the batter. Pour the batter into the prepared pan. Bake for 40 minutes, or until a toothpick inserted in the center comes out with moist crumbs clinging.
Allow the brownies to cool before slicing into bars. Place bars in a sturdy zip top bag and store in the freezer. Allow to freeze at least two hours before enjoying straight from the cold.