Preheat oven to 425°.
Coat a 10-inch cast-iron or heavy ovenproof skillet with oil and cooking spray. Place pan in a 425° oven for 7 minutes.
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour and next 5 ingredients (flour through cumin) in a bowl. Combine the milk and remaining ingredients in a bowl; add to the cornmeal mixture, stirring just until moist. Pour the batter into prepared pan.
Bake at 425° for 25 minutes or until a wooden pick inserted in center comes out clean. Cool in pan 5 minutes on a wire rack. Remove from pan.