In a large mixing bowl, add the flours, baking powder, ranch dressing mix, salt, and pepper. Stir to combine.
Using a pastry blender or fork, work the butter into the flour mixture until it is evenly distributed.
Add the bacon and cheese. Stir.
Pour in half of the buttermilk and stir. Add the remaining buttermilk and stir gently just until it is combined.
On a lightly floured surface, knead the dough 2-3 times. Press out with your hands until it is about one inch thick. Fold the dough in half and press again. Repeat this step two more times.
With a 3-inch cookie cutter, cut out the biscuits and place on a baking sheet lined with parchment paper.
Brush the tops of the biscuits with a beaten egg.
Bake in a preheated 375-degree oven for 30-35 minutes until lightly browned.