Preheat the oven to 375°F. Grease an 8” square or 9” round pan.
In a large mixing bowl, combine the flours, salt, baking powder, baking soda and salt. Add the cold butter and rub into the flour mixture until mixture is crumbly. Mix in the cheese.
Combine buttermilk and egg in a measuring cup and add to the dry ingredients, stirring just until everything is moistened.
Transfer this very sticky dough into the prepared pan. Use wet fingers to spread the batter around in the pan.
Bake in the preheated oven for 40-45 minutes or until the cake tester comes out clean.
Remove the bread from the oven and let cool for 5 minutes before turning it over onto the cooling rack. Wait for at least 20 minutes before slicing to avoid crumbling of the bread.