Whisk together the flours, baking powder and salt. Place the granulated sugar and butter in a large bowl. Beat with a mixer until pale and fluffy. Beat in the vanilla and egg. Alternate adding the flour mixture and milk, beginning and ending with the flour mixture. Gently fold in the raspberries. Scrape the batter into a 9-inch cake pan coated with cooking spray. Bake for 45 minutes, or until a wooden pick inserted in the center comes out clean. Cool for 10 minutes in the pan. Run a knife around the edge of the cake. Invert cake onto a wire rack, and cool completely. Turn cake right-side-up. Sift powdered sugar over top of the cake.