Cream butter well in a large mixing bowl. Add sugar gradually, mixing until texture is fine and mealy. Add eggs, one at a time, beating after each addition. Add flavorings. Combine flour and salt; stir flour mixture into batter, beating until flour is moistened. Do not overbeat. Pour into a greased and floured 10-inch tube pan. Bake at 325 for 1 hour and 25 minutes, or until a toothpick inserted comes out clean and cake shrinks slightly from sides of pan. Cool in pan 15 minutes. Turn out onto a wire rack; turn right side up and complete cooling. Sprinkle with confectioner's sugar for decoration, if desired.