Green Chile Cheddar Biscuits

 cups all purpose flour

 tablespoon baking powder

 teaspoon baking soda

 teaspoon salt

 tablespoons cold butter

 cup cold buttermilk

 cup finely shredded cheddar cheese

diced green chilies (rinsed well)

 teaspoon white pepper

Additional shredded cheddar for top of biscuits