– 2 tablespoons butter to grease the muffin tin – 1½ cup cornmeal – 1 tablespoon cornstarch – 2 eggs medium – ¾ teaspoon baking powder – 1 cup diced cheddar cheese – ½ cup whole milk or sour cream – ½ teaspoon salt – ½ cup sweet corn – ½ cup chopped raw spinach – 2 minced chicken sausage or ham – 1 teaspoon onion powder optional