1. Preheat oven to 350°.
2. Coat a 10-inch tube pan with cooking spray; dust with 2 tablespoons flour. Weigh or lightly spoon 13.5 ounces flour (about 3 cups) into dry measuring cups; level with a knife. Combine flour and next 4 ingredients (through salt) in a large bowl.
3. Place granulated sugar and next 7 ingredients (through eggs) in a medium bowl; beat with a mixer at low speed 2 minutes or until smooth. Add to flour mixture; beat until blended.
4. Pour batter into prepared pan. Bake at 350° for 45 minutes or until a wooden pick inserted in center comes out clean. Cool in pan for 15 minutes on a wire rack, and remove from pan. Cool completely on wire rack. Combine powdered sugar and 1 tablespoon lemon juice, stirring until smooth. Drizzle sugar mixture over cake. Garnish with rosemary sprig, if desired.