Combine first 7 ingredients in a medium bowl; stir well.
Combine sugar and oil in a large bowl; stir well. Add eggs, one at a time, beating well with a wire whisk after each addition. Stir in carrot, raisins, buttermilk, vanilla, and pineapple. Add flour mixture, and stir well.
Spoon batter into a 13- x 9- x 2-inch pan coated with cooking spray. Bake at 350° for 30 minutes or until a wooden pick inserted in center comes out clean. Cool completely in pan on a wire rack.
Prepare Cream Cheese Icing while cake cools. Spread Cream Cheese Icing over top of cooled cake.