Preheat oven to 350-degrees F. Prepare a muffin pan for 18 muffins with cooking spray or grease with butter. In a large bowl, whisk together dry ingredients: flour, baking powder, salt, sugar, cayenne pepper, ground black pepper. Set aside. In a separate bowl whisk together milk, eggs, and oil. Add wet ingredients into dry and mix until just combined. Do not over mix. Stir in ham, and cheese until just incorporated. Distribute batter evenly into 18 muffin cups, and bake at 350-degrees F for 30 minutes, or until a cake tester or toothpick comes out clean.