How to Make It
Preheat oven to 350°.
Weigh or lightly spoon flour into dry measuring cups; level with a knife. Combine flour and next 5 ingredients (through pepper) in a medium bowl; stir with a whisk. Make a well in center of mixture. Combine buttermilk, egg substitute, and oil; add to flour mixture, stirring just until moist. Fold in cheese, green onions, corn, and diced ham.
Spoon batter into 12 muffin cups coated with cooking spray. Bake at 350° for 23 minutes or until a wooden pick inserted in center comes out clean. Remove muffins from pan; place on a wire rack.