Grate 12 tablespoons butter for the biscuits.
In the bowl of your stand mixer, whisk the flour, baking powder, salt, 1 tablespoon plus 1 teas black pepper, and sugar. With your fingers, work the butter into the dough to coat.
Mash the egg yolks with a fork and add them to the flour mix, tossing everything together.
Using the mixer, slowly add in the buttermilk until the dough forms a tacky ball.
On a clean floured work surface, roll the dough together with your hands.
Cover with plastic wrap and let sit for 1 hour in the fridge.
Meanwhile, preheat the oven to 400.
When ready to cook, shape the dough into a large round about 1 ½" thick. Slice or cut into 4 large biscuits. Place into a greased cast iron pan, or onto a parchment lined baking sheet.
Melt the remaining 4 tablespoons butter and brush over the tops of the biscuits. Sprinkle a bit of kosher salt and the remaining black pepper over top.
Slide into the oven and cook for 10 minutes. Reduce the heat to 375 and continue to cook another 15 - 18 minutes until the biscuits are golden and fluffy.
Remove from heat and cool a few minutes before handling.
Keep the oven on for the bacon.