Preheat oven to 350°.
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour and next 6 ingredients in a large bowl; make a well in center of mixture. Combine pumpkin, sugar, oil, and egg in a medium bowl; stir with a whisk until well blended. Add to flour mixture, stirring just until moist. Turn batter into an 8 x 4-inch loaf pan coated with cooking spray.
Bake at 350° for 45 minutes or until a wooden pick inserted in center comes out clean. Remove from pan; cool completely on a wire rack.