Heat oven to 375 degrees. Spray 1 1/2 quart casserole with cooking spray.
Blend together flour, baking powder, salt and baking soda.
Cream together egg and sugar. Mix together with buttermilk.
Add dry ingredients to wet and mix on low until well combined. Stir in the raisins.
Pour into casserole dish and top with 2 tablespoons butter and sprinkle with sugar. Bake for 30 minutes at 375; lower temperature to 325 and bake for 20 to 30 minutes.