Preheat oven to 350 degrees F and grease a 9x5 inch loaf ban with non-stick cooking spray. Set aside
In a large bowl, whisk together the flour, baking powder, salt, cayenne, and black better
Mix in the cheese cubes until they are coated in the flour mixture
In a separate bowl, whisk together the milk, sour cream, melted butter, and egg
Gently fold the wet mixture into the flour mixture until just combined. The mixture will become thick
Spread the mixture into the prepared loaf pan and bake in preheated oven for 45 minutes
Remove from the oven, cool for 10 minutes then remove from pan and let cool on wire rack