
Cut cold butter into pieces and allow to soften on counter while mixing dry ingredients.
In a large bowl add flour, baking powder and salt, mix well.
Place the flour mixture in the bowl of stand mixer, add butter and grated cheese.
Using the paddle attachment mix until the butter forms into small peas.
Preheat oven to 400 degrees.
Add the buttermilk to the mixer and continue mixing until dough comes together.
Turn dough onto a floured surface and kneading several times.
Roll out dough to 1/2 inch think.
Using a round cookie cutter or drinking glass, cut out biscuits.
Brush biscuits with the egg wash and bake in oven for about 20-25 minutes then let cool on a wire rack.
Store in airtight container.